tag:blogger.com,1999:blog-87280712422930794172024-02-03T03:44:37.167+08:00Coffin班長的自強活動DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.comBlogger136125tag:blogger.com,1999:blog-8728071242293079417.post-73472904674660384232023-12-04T14:44:00.001+08:002023-12-04T14:44:57.139+08:00 EAR834P for real !<p>之前寫了一篇<a href="https://diycoffin.blogspot.com/2022/04/yoshino-834p-esoteric-audio.html" target="_blank">EAR834P WTF</a>的文章,算是拋磚引玉吧,真的有網友拿了一部原廠的834P來找我修理哈哈。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiU4BiU6mYxdnI6wkDNNx4ROfJYTWWBYX47WVFYEi7pCeloPW2odz2UP_Ss6df5NWFW8sucro-nmkA-sg1N0rc37kRDEatzObX9sbLWGYTKb3QcZ8M3whPcWHLKSCSPPGQh_c6JwpJMVZHLUgpVe76robBhM5DtN-YykxTOaPBWC8kEtAXor6oAn5aNipbt/s2000/EAR834P-fixed.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1614" data-original-width="2000" height="258" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiU4BiU6mYxdnI6wkDNNx4ROfJYTWWBYX47WVFYEi7pCeloPW2odz2UP_Ss6df5NWFW8sucro-nmkA-sg1N0rc37kRDEatzObX9sbLWGYTKb3QcZ8M3whPcWHLKSCSPPGQh_c6JwpJMVZHLUgpVe76robBhM5DtN-YykxTOaPBWC8kEtAXor6oAn5aNipbt/s320/EAR834P-fixed.jpg" width="320" /></a></div><br /><p><br /></p><p>主訴是,一開機,會看到有火花從一邊閃出,並且對於電容的品質有點介意.....</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXFvjBKAlRmUVbfUy7i02akIJNWHOG5JGI3kPTqPblJ4gFvrutstLhTzy3640jX4TtXXwRq8b3s2_-3KyfuaViBjaWySWwUxjw9N17gdnAhW2RzlAl86A8uO21ejgDcsH_hxinJDuoq9_25aFUQceLZYgN5oWdTYs54rIGiraidcWforGHm2Se2ShG3o-0/s2000/original_cap.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1473" data-original-width="2000" height="236" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXFvjBKAlRmUVbfUy7i02akIJNWHOG5JGI3kPTqPblJ4gFvrutstLhTzy3640jX4TtXXwRq8b3s2_-3KyfuaViBjaWySWwUxjw9N17gdnAhW2RzlAl86A8uO21ejgDcsH_hxinJDuoq9_25aFUQceLZYgN5oWdTYs54rIGiraidcWforGHm2Se2ShG3o-0/s320/original_cap.jpg" width="320" /></a></div><br /><p><br /></p><p>打開機箱,拆起板子,果然看到電源部分的PCB銅箔已經變色,有一個地方有焦黑。拆起一個可疑的電解電容,確實已經漏液,才會造成PCB銅箔的腐蝕。至於放大電路有沒有問題,要先待電源部分修理完成再檢視。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuK6vx_ekmyDPumh_Z_NKYLhaiwHKYHTOThu4Ldq4tJEUTwG9xm1HXT7gyhulwQ5uKWTLMs_w2fhKq8ETzZhjrK3hotPWYgKOuDtMH9Yu9VkxE3V37I5q_u4C5XEMhNGqzy5MGfvghn22Ro622OILVKgW4KUEJvlnERi7mauSQm8fjJKNoVn4_OrbA8yZT/s2000/burnt_pcb.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuK6vx_ekmyDPumh_Z_NKYLhaiwHKYHTOThu4Ldq4tJEUTwG9xm1HXT7gyhulwQ5uKWTLMs_w2fhKq8ETzZhjrK3hotPWYgKOuDtMH9Yu9VkxE3V37I5q_u4C5XEMhNGqzy5MGfvghn22Ro622OILVKgW4KUEJvlnERi7mauSQm8fjJKNoVn4_OrbA8yZT/s320/burnt_pcb.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgh5zsDSn9miQFnejoG9TZ6s1rDDhqMX8UXVtw4eT3qVoa8sDuSmNrTYmxyFoiXcqEUZuomtHWuiPIlzznrGK1WTAzLEgs7T4YHSl_wBjWdFoXzYywrb361mEdRiUpJV3-kuyQc_eIBbUcah3pU-GaqQJ8R02rbGnmk0W-sOOwRWI2LNxVTu5lgVlxkmmTQ/s2000/leaked.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1556" data-original-width="2000" height="249" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgh5zsDSn9miQFnejoG9TZ6s1rDDhqMX8UXVtw4eT3qVoa8sDuSmNrTYmxyFoiXcqEUZuomtHWuiPIlzznrGK1WTAzLEgs7T4YHSl_wBjWdFoXzYywrb361mEdRiUpJV3-kuyQc_eIBbUcah3pU-GaqQJ8R02rbGnmk0W-sOOwRWI2LNxVTu5lgVlxkmmTQ/s320/leaked.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfvN0QzOrkLoNsFmnr2LAGXQPELDQFc4p1rItfF_Kx0vL8HY6ukxkG8CN2kPH138SwYJxiMVI-aMcWCLCWMb9ntOs4b9UvbGxBltFtRGPRzzQW6O5tWEjg1RLH94YNb0UHNHcSRXZTx2AO5MM9larG8ygZPCUoHbet7pHS51jQUjs41JKibCuhQJcMU515/s2000/leakedcap.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfvN0QzOrkLoNsFmnr2LAGXQPELDQFc4p1rItfF_Kx0vL8HY6ukxkG8CN2kPH138SwYJxiMVI-aMcWCLCWMb9ntOs4b9UvbGxBltFtRGPRzzQW6O5tWEjg1RLH94YNb0UHNHcSRXZTx2AO5MM9larG8ygZPCUoHbet7pHS51jQUjs41JKibCuhQJcMU515/s320/leakedcap.jpg" width="320" /></a></div><br /><p><br /></p><p>拆下電解電容,修理清潔已經碳化的板子,再來就是下定新的電解電容。要一次買齊,又都要是真品,只能跟有信譽的材料行或是歐美大型的電子零件網購買。這次我是在<a href="https://www.mouser.tw/" target="_blank">Mouser</a>訂購的,像是<a href="https://www.digikey.tw/" target="_blank">Digikey</a>或<a href="https://twcn.rs-online.com/web/" target="_blank">RS</a>都可以。</p><p><br /></p><p>所需電容:</p><p><a href="https://www.mouser.tw/ProductDetail/661-EKY350ELL222MLN" target="_blank">Nippon Chemi-Con 2200uF/35V</a></p><p><a href="https://www.mouser.tw/ProductDetail/647-UVZ1V332MHD" target="_blank">Nichicon 3300uF/35v</a> </p><p><a href="https://www.mouser.tw/ProductDetail/647-UPW2C101MHD1TN" target="_blank">Nichicon 100uF/160V</a></p><p><a href="https://www.mouser.tw/ProductDetail/710-860021380015" target="_blank">Wurth 47uF/400V</a></p><p><a href="https://www.mouser.tw/ProductDetail/Nichicon/UPT2W101MHD?qs=Uimi0wr1Cyw1s6GluBl4aQ%3D%3D" target="_blank">Nichicon 100uF/450v</a></p><p><br /></p><p>換上新的電容,開機,沒有再閃火花,電壓也穩定,再來接上訊號,兩聲道都正常放大且一致,看來沒有什麼大問題。順便用<a href="https://www.facebook.com/groups/1625476474130994" target="_blank">e-tracer</a>測一下三支EAR原廠的ECC83,其中有一支的放射能力(屏流,互導)已經下降到30-40%。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRXDPXR4Peo1b6oE1X6SGFV798XfTZ-XfzAoQPGclhhJWk1Z5XCzXom8yR6JWLOgN3NF_qwrv9swZkDiX8dVtKzVfZb1yWDsowXpYy4L9oqvV8C0NVTVujwsvaDxDshkeQQ1HB0Xk9LIRL8y0J1wxskEyl7b6dgyCW8Yf19acsT29rO2DQxDDQXAHeI_1P/s2000/100u_400V.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1411" data-original-width="2000" height="226" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRXDPXR4Peo1b6oE1X6SGFV798XfTZ-XfzAoQPGclhhJWk1Z5XCzXom8yR6JWLOgN3NF_qwrv9swZkDiX8dVtKzVfZb1yWDsowXpYy4L9oqvV8C0NVTVujwsvaDxDshkeQQ1HB0Xk9LIRL8y0J1wxskEyl7b6dgyCW8Yf19acsT29rO2DQxDDQXAHeI_1P/s320/100u_400V.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz7ZkaVCa-R-1VQINQ_HYLxAuDXuZhtwmoOQ-hENaRHBgrafQeRoOwxLSZhNoo3t3KAHV32_Q_MKeRRowswH8_O1-N53WscjiuSgJ3Vda7UYRXb-vIsOrguaYoU1fy0QVHLDx7LhFMrTt5cVDNQjz9vb5Dq0_TOkeTELRDx3C1whHB0Ua9dxc0YFQJkpXr/s2000/PCB_patched.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1333" data-original-width="2000" height="213" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz7ZkaVCa-R-1VQINQ_HYLxAuDXuZhtwmoOQ-hENaRHBgrafQeRoOwxLSZhNoo3t3KAHV32_Q_MKeRRowswH8_O1-N53WscjiuSgJ3Vda7UYRXb-vIsOrguaYoU1fy0QVHLDx7LhFMrTt5cVDNQjz9vb5Dq0_TOkeTELRDx3C1whHB0Ua9dxc0YFQJkpXr/s320/PCB_patched.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi25p-9TkslOiv7pF1IjJo0zKA0xxOpJJU7zx481LrBo45spVpTGQZWUlJLX3SxJzDo20H6he3MTeuG7vsXP8FvIMv6Fw91HOwMKMf8YC6r87k4upFiLoTyaDo48q-BB1fNHOm4fORXu5LbnIUza9pGZOKn8r5Juw9lHoDqiBm1RcR4agH4E-LFmNgo_ain/s2000/recap.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi25p-9TkslOiv7pF1IjJo0zKA0xxOpJJU7zx481LrBo45spVpTGQZWUlJLX3SxJzDo20H6he3MTeuG7vsXP8FvIMv6Fw91HOwMKMf8YC6r87k4upFiLoTyaDo48q-BB1fNHOm4fORXu5LbnIUza9pGZOKn8r5Juw9lHoDqiBm1RcR4agH4E-LFmNgo_ain/s320/recap.jpg" width="320" /></a></div><br /><p><br /></p><p>接上系統試聽,哇好聽耶,好像比之前WTF的還要好聽?!總之使命達成。</p><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dy6bLp4xXxwOX3Uk63ksWZyUGolZBo-IxFYkh90Czujrnfz1A_T2uzg12sm5j3gR0BvUTNsQmAWZwkneTfYWA' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><p><br /></p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-8586710351130848552023-12-04T11:52:00.002+08:002023-12-04T11:52:48.131+08:00很A 很A~ Luxkit A501 / Avance Z501 再探<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-rIM3aTS4TranTYuwpZCfWXUaX3bXFdYG1YnOFVBf47QAdw4e5-wcf4tJE6MxKV90BIkbENja6p1AjINyR1YBF89SqMNMS2TygVk4DqcbtRdCwVdIbNMwRBEWR_1r5W_JbOKvVnne4ZZV1Us5LXKDSF5iwwsXkdWpiGXBBSbjDMrLv4PDoAvlxpr4OIW5/s4032/IMG_E1963.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-rIM3aTS4TranTYuwpZCfWXUaX3bXFdYG1YnOFVBf47QAdw4e5-wcf4tJE6MxKV90BIkbENja6p1AjINyR1YBF89SqMNMS2TygVk4DqcbtRdCwVdIbNMwRBEWR_1r5W_JbOKvVnne4ZZV1Us5LXKDSF5iwwsXkdWpiGXBBSbjDMrLv4PDoAvlxpr4OIW5/s320/IMG_E1963.jpg" width="320" /></a></div><br /><p><br /></p><p>十幾年前曾經跟過diysong李大的<a href="https://diycoffin.blogspot.com/2008/05/ready-camera-action-luxkit-501.html" target="_blank">Luxkit A501套件</a>,那時應該算是花了不少心力進去,聲音也真的很讚。最近李大又重新出了A501的套件,有網友找我幫他代組;同時手上又有一部日本原裝的A501要整理,那就再探再探重新回味!</p><p><br /></p><p>首先,關於STV-3H的問題。雖說他是相當於三個二極體串聯,學名叫變阻體,但是實測他的順向電壓,其實只有1.5-1.6V左右,用三個1N4148串起來可能有2-2.1V,這個電壓會影響偏流的大小。實作時可以串兩隻1N4148,但是電壓又會略小。至於有人說SV-03跟STV-3H可以互換,但我手上有的SV-03順向電壓比較高,直上取代的偏流會很高,調不下來。或許可以試著用Schottky二極體試試看,但是它的溫度係數是否跟STV-3H一樣則須考慮進去。</p><p><br /></p><p>這個連結是有列出STV-3H以及其他變阻體的規格:</p><p><a href="http://www.datasheetarchive.com/datasheet?id=6a7e4374e72b89dc3d7309c5dc5a6f21fa5c4c&type=O&query=STV2H">http://www.datasheetarchive.com/datasheet?id=6a7e4374e72b89dc3d7309c5dc5a6f21fa5c4c&type=O&query=STV2H</a></p><p><br /></p><p>而底下這個日文Q&A網站有比較詳細地解釋要怎麼取代STV-3H,我擷取了圖片:</p><p><a href="https://oshiete.goo.ne.jp/qa/8226564.html">https://oshiete.goo.ne.jp/qa/8226564.html</a></p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjHk4UYycKoztfa-N4lcC0LPzR7whnW15v09tTRHwLyudRphlarotQgU88y-GzGV95aSaVjSNqrVDEcpINF1a2BDzqnExyqhyphenhyphenGGVJzfPwbYjorjpoFgvDDHgrrVCxH_y6gP-HjKQtd7Jy9J4J30VK8eGB92loaAJJzxZQWthLz8xVB0RbHC3kfXbS6GEWm7/s270/sTV3h.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="230" data-original-width="270" height="230" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjHk4UYycKoztfa-N4lcC0LPzR7whnW15v09tTRHwLyudRphlarotQgU88y-GzGV95aSaVjSNqrVDEcpINF1a2BDzqnExyqhyphenhyphenGGVJzfPwbYjorjpoFgvDDHgrrVCxH_y6gP-HjKQtd7Jy9J4J30VK8eGB92loaAJJzxZQWthLz8xVB0RbHC3kfXbS6GEWm7/s1600/sTV3h.jpg" width="270" /></a></div><br /><p><br /></p><p><br /></p><p>先看Diysong新版的A501。這次的散熱片直接改成傳統鋁擠型的,方便施工,不過若是要像原機在純A類時有1.2A的偏流,散熱能力不是很夠,建議調整到500-600mA。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9TJ9UThlRR0ZlY0BE8a6bFCbIlajQlRbMF9LQtFfkJMHqCcOR0U4mvMqGB3o4j-iRro5QtotsG532t4ymjjRJ9axyHZvO131ZKedoW8GZC70sv3SahtcSsllyFgULs4hiWPykFS0ZrBUCNVmcsiLRD1b3tvTuyURx0lVhb45ptzoC3jA-wGI1M_FO4_J_/s4032/DS_A501_heatsink.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9TJ9UThlRR0ZlY0BE8a6bFCbIlajQlRbMF9LQtFfkJMHqCcOR0U4mvMqGB3o4j-iRro5QtotsG532t4ymjjRJ9axyHZvO131ZKedoW8GZC70sv3SahtcSsllyFgULs4hiWPykFS0ZrBUCNVmcsiLRD1b3tvTuyURx0lVhb45ptzoC3jA-wGI1M_FO4_J_/s320/DS_A501_heatsink.jpg" width="320" /></a></div><br /><p><br /></p><p>開關,stereo/btl選擇以及A/AB類選擇都規劃在正面,很方便;不銹鋼面板很豪華耐久。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJ16vu8Y2DQIdpNLHGe5Lm6QAkXFMvYEk6o9swQWb-v4FPILa2t7dFE9X6TpGl-KIu6qe3WeRMOAnnrzQrpcv90n0bwEMQGVUSSbvDHNb8JNBgV_aPlThk1L4rPLz89EQCMd16bK24QpUcu2dEeK73GQbQYvfajrv6UxiYnheo5aJ3EskUI48s9pWz212B/s2000/DS_A501.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1339" data-original-width="2000" height="214" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJ16vu8Y2DQIdpNLHGe5Lm6QAkXFMvYEk6o9swQWb-v4FPILa2t7dFE9X6TpGl-KIu6qe3WeRMOAnnrzQrpcv90n0bwEMQGVUSSbvDHNb8JNBgV_aPlThk1L4rPLz89EQCMd16bK24QpUcu2dEeK73GQbQYvfajrv6UxiYnheo5aJ3EskUI48s9pWz212B/s320/DS_A501.jpg" width="320" /></a></div><br /><p><br /></p><p><br /></p><p>再來是日本Luxkit原廠的A501。(BTW後來我才知道,這款套件當年在北美地區是以Avance這個牌子銷售,編號是Z501。)這部在家裡蒙塵一陣子,趁著幫網友裝機,對電路記憶猶新之際搬出來。目視檢查發現它有些接線已解焊,一個聲道的功率級缺了一些零件。再檢查才發現同一聲道的功率晶體/偏流小晶體已陣亡,射級電阻一邊也開路,就修一修換一換連一連,搞定。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9-5HWKioE0CeRcPvVxnG6QMuvnbZrC7e8g9o7DbdDmRXP4E5wDEYSIKSgkOG24yXlQzBqM5-zrJmmYhUODgO6Meb6vO7N4BjszXANFsOhzz8Spf2AaJIxeAVJxa-6d_eo6BrTl6DC203Oj68Er2N8eGIneR-rgtwzU08tAZXA4zYPDp2gYJZUlKAV4T-d/s2000/A501_top.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9-5HWKioE0CeRcPvVxnG6QMuvnbZrC7e8g9o7DbdDmRXP4E5wDEYSIKSgkOG24yXlQzBqM5-zrJmmYhUODgO6Meb6vO7N4BjszXANFsOhzz8Spf2AaJIxeAVJxa-6d_eo6BrTl6DC203Oj68Er2N8eGIneR-rgtwzU08tAZXA4zYPDp2gYJZUlKAV4T-d/s320/A501_top.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2g_FePt-3rzIROjAgpMke2GOzjIvaSnC8ys7l6W9R4nWnwCrhS2KXTrO4lFhW7FdAl4QwHKVYPTj1jlgFmdPHT5gWSu8dZo1GvRyDbGQH3WjHq05we0j8cA8w3J1scNKYSZxkkUoeU69hPNzwKZWyoa4npyHdbxY2Taw0NtJiKwHs4I0X9d-f8FzgvdPQ/s2000/power.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2g_FePt-3rzIROjAgpMke2GOzjIvaSnC8ys7l6W9R4nWnwCrhS2KXTrO4lFhW7FdAl4QwHKVYPTj1jlgFmdPHT5gWSu8dZo1GvRyDbGQH3WjHq05we0j8cA8w3J1scNKYSZxkkUoeU69hPNzwKZWyoa4npyHdbxY2Taw0NtJiKwHs4I0X9d-f8FzgvdPQ/s320/power.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNySs2CDy6QHEZgB-mpmIB71OTgXdlfO4cVSSRovQivkVv7t16HZy7iuwAF-jwYxBXf3SOpUTFGOF83sgNnCu1fMcvMle4J47HMun7PO2qweKnwgYcklSfQlPuh659F21b34w5hNax0mIdZsFgzU2NblJHbl3S7-RTKcDLTEPCjeti8p4iyZS_nFwZVro1/s2000/sine.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNySs2CDy6QHEZgB-mpmIB71OTgXdlfO4cVSSRovQivkVv7t16HZy7iuwAF-jwYxBXf3SOpUTFGOF83sgNnCu1fMcvMle4J47HMun7PO2qweKnwgYcklSfQlPuh659F21b34w5hNax0mIdZsFgzU2NblJHbl3S7-RTKcDLTEPCjeti8p4iyZS_nFwZVro1/s320/sine.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoxMf5CX3QUWYCrayylgMr9Ok2Uw9cCbpbrcO-rW1hIYD9uYzvC3gPs4TPZeo91n8V1JXXyZcd6h6T1tfy0vd5z-hi2x9aIjPqdnEjvIGj8jt450IamYmKuK5rnF6tLylqN4tnz-6QaWK_H-Ku-jNCym_Jd2VMc95ANnilGdowreGrqfGleC6IWxyLipbo/s2000/square.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoxMf5CX3QUWYCrayylgMr9Ok2Uw9cCbpbrcO-rW1hIYD9uYzvC3gPs4TPZeo91n8V1JXXyZcd6h6T1tfy0vd5z-hi2x9aIjPqdnEjvIGj8jt450IamYmKuK5rnF6tLylqN4tnz-6QaWK_H-Ku-jNCym_Jd2VMc95ANnilGdowreGrqfGleC6IWxyLipbo/s320/square.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLk5XL6KTiOPE0QpdmldVtnV-AFWx6cwhXcVYc7xCGZno_WnFPtPURd82NDFHzroM6t9PYPoe0_d6Cdq-LYaZZ_fFa3IUDwNsjRAUX7GwyNij76oMfcUrkqp5cTnai5jogEu3Dgmla4kffZgiwORug6S3jrphYk7Dlp3X0bfd5plH3sGEGW-7Kv4SHGUmy/s2000/A501_front.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="963" data-original-width="2000" height="154" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLk5XL6KTiOPE0QpdmldVtnV-AFWx6cwhXcVYc7xCGZno_WnFPtPURd82NDFHzroM6t9PYPoe0_d6Cdq-LYaZZ_fFa3IUDwNsjRAUX7GwyNij76oMfcUrkqp5cTnai5jogEu3Dgmla4kffZgiwORug6S3jrphYk7Dlp3X0bfd5plH3sGEGW-7Kv4SHGUmy/s320/A501_front.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8XCHiOLIRrb-otXzhdroSR8MJyxqDF6Yd5cQpnAJfkwWiuosLonOVhLYSvHIlt4Wg0vXFaoEbGyDEPK9a1hBMAyb4v58SGsP2aN26DUr95kSke38AtSYc0BqnE7N1RtRy6j7KYSvIvsGt5ro41atldVQwO08ruXbvxaYyL6rT_hcmIQmZgztdB6njVAWs/s2000/A501_inout.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1152" data-original-width="2000" height="184" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8XCHiOLIRrb-otXzhdroSR8MJyxqDF6Yd5cQpnAJfkwWiuosLonOVhLYSvHIlt4Wg0vXFaoEbGyDEPK9a1hBMAyb4v58SGsP2aN26DUr95kSke38AtSYc0BqnE7N1RtRy6j7KYSvIvsGt5ro41atldVQwO08ruXbvxaYyL6rT_hcmIQmZgztdB6njVAWs/s320/A501_inout.jpg" width="320" /></a></div><br /><p><br /></p><p>新舊兩部的聲底,跟我記憶中2006年那部的聲底是非常接近的,很有密度跟音樂感的後級,如果你有幸收到一部,真的可以放心好好地聽音樂了。</p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-27438527438095808772023-12-03T16:17:00.002+08:002023-12-10T13:46:51.254+08:00很A 很A ~ Musical Fidelity A1 X 修理延壽<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_NElHjPwHxU4CdCK6LWtKjypjKTchHPbYoBNJ91oBQ6rLvrUszd6MyQv8dDVzRvD-HJSKii-Dv08uh_g88iomulx9X74Sisv2tyPGZq798sNfGTHRLdSbvBUNnrncFzZYJfql-Ud-qDHt0Y1Hw43bkPUATcxDCTR2afANIrpigpZ2dilSWji3LBluIdPn/s2000/A1X.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_NElHjPwHxU4CdCK6LWtKjypjKTchHPbYoBNJ91oBQ6rLvrUszd6MyQv8dDVzRvD-HJSKii-Dv08uh_g88iomulx9X74Sisv2tyPGZq798sNfGTHRLdSbvBUNnrncFzZYJfql-Ud-qDHt0Y1Hw43bkPUATcxDCTR2afANIrpigpZ2dilSWji3LBluIdPn/s320/A1X.jpg" width="320" /></a></div><br /> <p></p><p>Musical Fidelity A1,在台灣俗稱鐵板燒,是90年代非常有名的一部A類綜合擴大機。有別於當時百花齊放的各式綜合擴大機,它的聲音溫暖又厚實,非常有特色,至今除了它上板一大片溫熱的散熱片以外,它的音色依然被人津津樂道。</p><p><br /></p><p>這次是老友拿來的,他沒有空修理,主訴是一邊會沒有聲音,所以叫我幫忙看看。搜尋網路,得知有位英國的前輩Mark Hennessy曾經對它做了<a href="https://www.markhennessy.co.uk/mf_a1/index.htm" target="_blank">詳細的剖析</a>,非常值得參考。簡單來說,因為機器本身會散發高熱,並且在前級電路有一些會造成老化的設計,所以經過維護跟修改後,妥善率跟音色都會進一步提升。</p><p><br /></p><p>總之拿到機器,先開機來聽聽看,果然有一個聲道的聲音時有時無,切換看看,應該是波段開關或者錄音監聽開關的接觸不良。拆開機器來看看。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOd2S2fYzuPKeos6T-juLsVXZMQyzowvT_2am915t6OfFHLNxyafBAtn5GUAsqZ4xDB3Kg3o9kHyt-lFe13WN1bUSSgnhb7kGOyr_h33GhVx0wftMgqaVJa4k9pTs108UVLxZQPV93vgMMSYun9eB1ANcBCcYmX4pNySKnUHnJ5imAz52ecZfYJmrHBNs-/s2000/selector.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOd2S2fYzuPKeos6T-juLsVXZMQyzowvT_2am915t6OfFHLNxyafBAtn5GUAsqZ4xDB3Kg3o9kHyt-lFe13WN1bUSSgnhb7kGOyr_h33GhVx0wftMgqaVJa4k9pTs108UVLxZQPV93vgMMSYun9eB1ANcBCcYmX4pNySKnUHnJ5imAz52ecZfYJmrHBNs-/s320/selector.jpg" width="320" /></a></div><br /><p>首先發現,波段開關整個不翼而飛,難怪之前試著從CD跟Tape以外的輸入端接訊號,都沒有反應。後來檢查底板,前手維修確實是把CD輸入直接拉線接到tape開關了,至少它還有兩組輸入可以用。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5BQuATDe-ZM2tMChTr4Zy2N6ieYNGOLJmSpJKju7DIDKLKJr6tXZLvzJB1czFwYrpUshdgrc3UJqn_jQRmrMXCp9Jk2OFon_YY6u1JozVYykcx8bOwfrudZCWbQYl4iDpt-Dcxvurm0U4ev2v0JJoTdBxgRLoCxd-dTNhAATEc8j7G4SFHp5UgQVdah9Q/s2000/preamp_as_is.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5BQuATDe-ZM2tMChTr4Zy2N6ieYNGOLJmSpJKju7DIDKLKJr6tXZLvzJB1czFwYrpUshdgrc3UJqn_jQRmrMXCp9Jk2OFon_YY6u1JozVYykcx8bOwfrudZCWbQYl4iDpt-Dcxvurm0U4ev2v0JJoTdBxgRLoCxd-dTNhAATEc8j7G4SFHp5UgQVdah9Q/s320/preamp_as_is.jpg" width="320" /></a></div><br /><p>音量的部分也有換過,但是應該架構是跟原來一樣的。</p><p><br /></p><p>Mark Hennessy在他摩改的文章裡,直接跳過原來的前級,加了一個新的電路進去。對我來說,用現有的架構來修改,會比較實際,所以我用原來的前級,修改了一下,如下圖:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjK22vcoNLMmR7OHeS9WyVpOhFY30Kgs-UARGy_xuIi9VMV70m-6EGFUUZf08_pF6pYCiZvQ0vN7fF-UkqddZM_cdFN0RIAw6biCfkHNjbPp55BzJbSkzyZMvLejkL5NBFZH9a0k_xLuPLwrrwI5kKeDI-SceBCbVQYKQJjqNMsTRHxGZaavG3Xd8uSwChM/s800/a1_schematic_preamp_mod.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="578" data-original-width="800" height="231" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjK22vcoNLMmR7OHeS9WyVpOhFY30Kgs-UARGy_xuIi9VMV70m-6EGFUUZf08_pF6pYCiZvQ0vN7fF-UkqddZM_cdFN0RIAw6biCfkHNjbPp55BzJbSkzyZMvLejkL5NBFZH9a0k_xLuPLwrrwI5kKeDI-SceBCbVQYKQJjqNMsTRHxGZaavG3Xd8uSwChM/s320/a1_schematic_preamp_mod.jpg" width="320" /></a></div><br /><p>為了避過TL084可能產生的DC offset,我直接在反向放大的輸入跟輸出加上交連電容,並且原來調整gain的"音量"改成固定電阻,把音量加到功率放大級之前。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEWcofCaVDAOuLJnWJ5ACYeyiDR-yx_yvQGehK7H6UEyvnJtM2dw6uXrvhpEAdEauA0jfhfaD83_O84w26yk_R_K4pC7L4vPA9r5yG3sgVB5PNdaiaWJ0w4SSmLQMKeRXwCzWtfmGqRNVjM7VezUgeMysb7b8oM4EYlROzeU3HMtSWGeAyxJ5tT5MJNviu/s2000/preamp_mod.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEWcofCaVDAOuLJnWJ5ACYeyiDR-yx_yvQGehK7H6UEyvnJtM2dw6uXrvhpEAdEauA0jfhfaD83_O84w26yk_R_K4pC7L4vPA9r5yG3sgVB5PNdaiaWJ0w4SSmLQMKeRXwCzWtfmGqRNVjM7VezUgeMysb7b8oM4EYlROzeU3HMtSWGeAyxJ5tT5MJNviu/s320/preamp_mod.jpg" width="320" /></a></div><br /><p>這是改好的前級,交連電容用1uF~3.3uF都可以。</p><p>再來就是把功率級的小電容都換掉,因為他們長年在靠近功率晶體旁邊,壽命都應該差不多了,通通換成105度的電容。銘黃色的兩個不是鉭質電容,而是epoxy包覆的電解電容,聲音很不錯。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgm25XPPBMjjdxZobctn_R3WyHVqjnajtj0NkQwLKZY9hgXJucHU_j7pIlH7TpV5TEMxmgooD99Iq2pxyH9Nv0hNKpPaieh8r7GkvOGyEQL3q83qDQI7gmPYHL0iM3PpjxxNOrSmjlh_HHCYU_oyYctLDgbwLPaw5tUBYn979O5a9eObaRIXkw3Q-eeZcqg/s2000/poweramp_recap.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1201" data-original-width="2000" height="192" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgm25XPPBMjjdxZobctn_R3WyHVqjnajtj0NkQwLKZY9hgXJucHU_j7pIlH7TpV5TEMxmgooD99Iq2pxyH9Nv0hNKpPaieh8r7GkvOGyEQL3q83qDQI7gmPYHL0iM3PpjxxNOrSmjlh_HHCYU_oyYctLDgbwLPaw5tUBYn979O5a9eObaRIXkw3Q-eeZcqg/s320/poweramp_recap.jpg" width="320" /></a></div><div><br /></div><br /><p>換下的電容跟可變電阻。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNZ3mzx7q7eTJsaU2LiDctLdSmRL5jfBN1hi-9FJDjNTsL_M79ufRw3oCmnqtnay2FF4yaiSp-eDtaQxoOtfDrTlGricUVPgx6BYpZ3Hx8r9JkIrCO-vWpvNOGeTWQFB5Dz3hKXkyNvUrZoSd3_hIASCCiGE5DHUKck57Z2Odcdfeo0UPMgdSvxB8eQmLC/s2000/swapped.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNZ3mzx7q7eTJsaU2LiDctLdSmRL5jfBN1hi-9FJDjNTsL_M79ufRw3oCmnqtnay2FF4yaiSp-eDtaQxoOtfDrTlGricUVPgx6BYpZ3Hx8r9JkIrCO-vWpvNOGeTWQFB5Dz3hKXkyNvUrZoSd3_hIASCCiGE5DHUKck57Z2Odcdfeo0UPMgdSvxB8eQmLC/s320/swapped.jpg" width="320" /></a></div><br /><div>輸出1KHz波型都很不錯。</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDRtu93z8QgVPq6kMqFj9pnIYFIWnZFoeXEk-2CjYZpX0G8URrX4uATG9HyGjn9sOkkI8A7P20PpOnKYYiRvczYiGBZ0UadUWsmQkrDZt98OYLxzGgg_FMlMYuER1VtsFU-hOdwNvVqjpsR26yNNqYXUx__54RJUXZG-RT5icitikbM-rXl3SxEl1u4JgW/s2000/sine.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDRtu93z8QgVPq6kMqFj9pnIYFIWnZFoeXEk-2CjYZpX0G8URrX4uATG9HyGjn9sOkkI8A7P20PpOnKYYiRvczYiGBZ0UadUWsmQkrDZt98OYLxzGgg_FMlMYuER1VtsFU-hOdwNvVqjpsR26yNNqYXUx__54RJUXZG-RT5icitikbM-rXl3SxEl1u4JgW/s320/sine.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwdaD-YrRGdK7I5fpKqD5YYYm3oUzY9r7wbLHj05wa3_WKK_nAeqgOkxouqanu61fHG_xx6-lNWxTTJQ3m52ajivL3bTYUauS34E3v1nj9royBXI4nPlMnqTh32FshvBIvQovBXUKexqeSNOr543T3fsWoxIs7VaHiajgg24youXSETI0dhMqb9eUSP6di/s2000/square.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwdaD-YrRGdK7I5fpKqD5YYYm3oUzY9r7wbLHj05wa3_WKK_nAeqgOkxouqanu61fHG_xx6-lNWxTTJQ3m52ajivL3bTYUauS34E3v1nj9royBXI4nPlMnqTh32FshvBIvQovBXUKexqeSNOr543T3fsWoxIs7VaHiajgg24youXSETI0dhMqb9eUSP6di/s320/square.jpg" width="320" /></a></div><br /><div><br /></div><div>接上喇叭試音,透明度跟質感都有相當的提升,而且音量跟切換開關也不會那麼容易壞了,可以再聽個很多年。</div>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-18471439199731183612023-08-15T11:54:00.000+08:002023-08-15T11:54:24.425+08:00Diysong 6AQ5 PP 套件簡記<p>2023年,Diysong推出了6AQ5的推挽管機套件,詳情請見此:</p><p><a href="https://www.facebook.com/groups/diysong/posts/10159974640934775/">https://www.facebook.com/groups/diysong/posts/10159974640934775/</a></p><p><br /></p><p>電路圖在此:</p><p><a href="https://www.facebook.com/groups/diysong/permalink/10159983815744775">https://www.facebook.com/groups/diysong/permalink/10159983815744775</a></p><p><br /></p><p>官方組裝說明在此:</p><p><a href="https://www.facebook.com/groups/diysong/permalink/10160056976474775">https://www.facebook.com/groups/diysong/permalink/10160056976474775</a></p><p><br /></p><p>因為幫網友組裝了一部,在此短短記下一些筆記。</p><p><br /></p><p>下圖是站長另外傳給我的電路圖,上面有標記電壓。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmU9h6rpu3jIYOA-ihaSDorkeWwjTJMyHAvC-9dv8WFJsc_ybrM6enASyps1XKcwE2Ri_t2q-4dVRLSvk-g4jhTZHqca5TBFG9tJJ5-0S6Uv6PLW7ARxAO4RNFTloDpWWNvEOtG_Ikqd0S5rFB4tyRLbIlmg8KaI5iF4fiiNkr3voh5KbZbRvoQ-bUWvnh/s1692/%E7%9B%B8%E7%89%87%202023-8-11%2017%2009%2034.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1504" data-original-width="1692" height="284" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmU9h6rpu3jIYOA-ihaSDorkeWwjTJMyHAvC-9dv8WFJsc_ybrM6enASyps1XKcwE2Ri_t2q-4dVRLSvk-g4jhTZHqca5TBFG9tJJ5-0S6Uv6PLW7ARxAO4RNFTloDpWWNvEOtG_Ikqd0S5rFB4tyRLbIlmg8KaI5iF4fiiNkr3voh5KbZbRvoQ-bUWvnh/s320/%E7%9B%B8%E7%89%87%202023-8-11%2017%2009%2034.gif" width="320" /></a></div><br /><p><br /></p><p>1. 主板部分:請參考組裝手冊,一個電容要改極性,管座裝在背面。另外,我把大瓦數電阻也裝在背面,以得較佳的散熱效果。</p><p>2. 音調板部分:VR不用反裝,此板上的I/O要跟主板上的I/O對調。</p><p>3. 機箱部分:所有鎖上蓋的螺牙需要攻牙以去除噴漆。另外鎖音量以及高低音調整的孔位,要刮除烤漆已達成與機箱良好接觸。機箱要找一個螺絲孔刮除烤漆,將此處與濾波電容的地電位,用地線接觸鎖緊。</p><p>4. 燈絲部分:信號管的燈絲要一邊接地(推薦輸入管的第九腳去接地);功率管的燈絲要各焊一個150-200/0.5W的電阻去接地。</p><p>5. 真空管部分:第一級的管子,個人認為12AX7的放大倍率太大,容易感染雜音,建議改成12AU7;其他不變。</p><p><br /></p><p>下圖是燈絲未接地並使用12AX7的雜訊。(50mV div.)</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnjg7QVqdpFh5h5FesY28rUHhXCTPEqWdHPKeWarNbBq3ca78XPWrFiy88kfC7TFxubnRz_h79BmFqYrGfyTLGq6iJTqoNLdHQ_LytmkiKA02DJBtl6_auy-HWA-hLUuF8e-JXFbtsacAESH-HOPw2DYTfQ1_2NU4JiEh-hmIEsHd6YEUX_CYI-DefkLg8/s2000/noise-50mvdiv.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnjg7QVqdpFh5h5FesY28rUHhXCTPEqWdHPKeWarNbBq3ca78XPWrFiy88kfC7TFxubnRz_h79BmFqYrGfyTLGq6iJTqoNLdHQ_LytmkiKA02DJBtl6_auy-HWA-hLUuF8e-JXFbtsacAESH-HOPw2DYTfQ1_2NU4JiEh-hmIEsHd6YEUX_CYI-DefkLg8/s320/noise-50mvdiv.jpg" width="320" /></a></div><br /><p><br /></p><p>砲灰喇叭的雜音。</p><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dwiT7IyJkawV77PHJ3XGqTTyr0kNwRHIoP7sfY8Pqqup9mfUu-1qzHYZfi5JPkFcFvubyimSMKw_oxGpXZQ6g' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><p><br /></p><p>改好的機內圖。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlm7m_ZSHUyqXUsawIa-e8WIFbMUDxTjRKkiJpt8_98PFYmhiYCWa6B0aH6A-7TJI7sUtKom9uUY6ufk3RJdZCjBCT_3PrQDp7dO_XoQMVvbPIwZM3R5f7_iiXYfASpL53G0-Zkj_EbXCRmo-aMWApUPgUPzu6q-Uhv_vVtyqMsixxFymwYKVw-6zsc2Sc/s2000/inside.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1765" data-original-width="2000" height="282" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlm7m_ZSHUyqXUsawIa-e8WIFbMUDxTjRKkiJpt8_98PFYmhiYCWa6B0aH6A-7TJI7sUtKom9uUY6ufk3RJdZCjBCT_3PrQDp7dO_XoQMVvbPIwZM3R5f7_iiXYfASpL53G0-Zkj_EbXCRmo-aMWApUPgUPzu6q-Uhv_vVtyqMsixxFymwYKVw-6zsc2Sc/s320/inside.jpg" width="320" /></a></div><br /><p><br /></p><p>板子近照。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWTrQ3Cv65L6BUc1cNZ_hewNHk_TjYF7XP0prsyqLsSCXsd3Q8EWtsW093yL3B94tllILtnsCdRgmCFwJ-67SYXGfS3_K0r4sMRABVJBIKphY8ie-O40zf2keCFbrb9QzRHwSYKkFvEKt-tjcrmEDgcp8bWn_DU7C8HW47ammVJmNoLy-gKeQuyhVgx3AN/s2000/pcb.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1556" data-original-width="2000" height="249" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWTrQ3Cv65L6BUc1cNZ_hewNHk_TjYF7XP0prsyqLsSCXsd3Q8EWtsW093yL3B94tllILtnsCdRgmCFwJ-67SYXGfS3_K0r4sMRABVJBIKphY8ie-O40zf2keCFbrb9QzRHwSYKkFvEKt-tjcrmEDgcp8bWn_DU7C8HW47ammVJmNoLy-gKeQuyhVgx3AN/s320/pcb.jpg" width="320" /></a></div><br /><p>機器99%完成圖(缺面板)。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKtmaP0BJbVTIR1n5VurScSZXKAUTG8JTVuSr9DOZm6blrOK5WUFCnwH4KM9pQIXo5BrWUPP95kU4RGVwbUR2AfQaOqhtpd_JaypwUc3WsibIkcWwrAAdA5B50fM2kjrPr7wGC1KQlNS4yf0vmW7lXKkTypvG8bv31K-BVFyFcHd7cnNH0xF8OyOCuyhnv/s2000/chassis.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1370" data-original-width="2000" height="219" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKtmaP0BJbVTIR1n5VurScSZXKAUTG8JTVuSr9DOZm6blrOK5WUFCnwH4KM9pQIXo5BrWUPP95kU4RGVwbUR2AfQaOqhtpd_JaypwUc3WsibIkcWwrAAdA5B50fM2kjrPr7wGC1KQlNS4yf0vmW7lXKkTypvG8bv31K-BVFyFcHd7cnNH0xF8OyOCuyhnv/s320/chassis.jpg" width="320" /></a></div><br /><p><br /></p><p>試音,很好聽的。</p><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dyXcTDZuLzEklU5azXtwfs37lg5FA-Z6-_WIKv7X54C3SyzCznq3Z86usAV9vwldJpvSRk2FIOyD16HJXroiA' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><p><br /></p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-63280155495425155162023-02-14T19:09:00.004+08:002023-02-14T19:09:24.762+08:006ж52п直交6П36С單端 小改<p> 之前製作的<a href="https://diycoffin.blogspot.com/2014/10/652636.html">6ж52п直交6П36С單端</a> ,借出去一段時間,感謝某大師幫我run in,拿回來之後火氣少超多,整個就是好聽。不過它前級管一直有接觸不良的問題,應該是我買到了仿冒的CMC管座。今天突然下雨,原來要做的事延緩,就利用短短的時間把管座換一換吧。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhL8JAHS7nXXPca7vL1ACAfDywFKALdrCg6sBB6X7fgBRuT5O3fMzABP89M2bUmF5-sa9Rvysp0CoBnj_-Vkj-6Sod9O3ko-iCkg7PxnAVF0LNlC4mJr0QDAxYGsXQL0aG8xtSd940PJOldjtEK9KenAYgku0RCouoT79hrqwERw74d-CUeC2mlu1_jvg/s2000/original.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhL8JAHS7nXXPca7vL1ACAfDywFKALdrCg6sBB6X7fgBRuT5O3fMzABP89M2bUmF5-sa9Rvysp0CoBnj_-Vkj-6Sod9O3ko-iCkg7PxnAVF0LNlC4mJr0QDAxYGsXQL0aG8xtSd940PJOldjtEK9KenAYgku0RCouoT79hrqwERw74d-CUeC2mlu1_jvg/s320/original.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">原來的管座</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP8QD9AybWjAQA7D1mQ7KIGs8g8eFX2EYwFjn__-wjGwlxCpVs_FsosfDdKQ92TGxVXQDG8Oh7WqveAyoHhtozjVu4F6lCETJvqA6A2qmYsawMQyA_6V3Zw4EJ4zIsQJNYKtoAav0VX5hxFW2mlOFdYFb3FMpbG6IXm4yv-SFY1dntHwg5sdu-wSAMIA/s2000/old-9-front.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP8QD9AybWjAQA7D1mQ7KIGs8g8eFX2EYwFjn__-wjGwlxCpVs_FsosfDdKQ92TGxVXQDG8Oh7WqveAyoHhtozjVu4F6lCETJvqA6A2qmYsawMQyA_6V3Zw4EJ4zIsQJNYKtoAav0VX5hxFW2mlOFdYFb3FMpbG6IXm4yv-SFY1dntHwg5sdu-wSAMIA/s320/old-9-front.jpg" width="320" /></a><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEji5q28Okla3gOEOuMqww6_jcCM02Vlk0MMhGNW5eqGM6wF1NNs7-5VQM43ldh04T5_tlEILvwUFbz4th7N_b79oIwv0TrVx8GFvufOmfhgAyrHND7NmSuvnUd9MdJ3CmoOh39FYXWGVRySxiScpgm9X677pUoBXdT9P1vSMqQADpkFNi1UJqyj-QmwrQ/s2000/old-9-back.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1491" data-original-width="2000" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEji5q28Okla3gOEOuMqww6_jcCM02Vlk0MMhGNW5eqGM6wF1NNs7-5VQM43ldh04T5_tlEILvwUFbz4th7N_b79oIwv0TrVx8GFvufOmfhgAyrHND7NmSuvnUd9MdJ3CmoOh39FYXWGVRySxiScpgm9X677pUoBXdT9P1vSMqQADpkFNi1UJqyj-QmwrQ/s320/old-9-back.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">原來的管座拆除</div><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjojzv5_klsUXPQ1zuXnOk-NegKzY8v5I2xJCx_FAlWopb3Npineq73cNjxKbPS3VPB_Px8BNMkE98pnldrOpilfNKU5R5M2pxjowzjhelmsDjkJxurV-TcmFEe18mmU52WcJLQg8vbN8mngjv9I-X0nnNF3F54PTbnMEebSf1ygY6ajG2t7vbN74WkWQ/s2000/New-9-back.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1482" data-original-width="2000" height="237" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjojzv5_klsUXPQ1zuXnOk-NegKzY8v5I2xJCx_FAlWopb3Npineq73cNjxKbPS3VPB_Px8BNMkE98pnldrOpilfNKU5R5M2pxjowzjhelmsDjkJxurV-TcmFEe18mmU52WcJLQg8vbN8mngjv9I-X0nnNF3F54PTbnMEebSf1ygY6ajG2t7vbN74WkWQ/s320/New-9-back.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicm98Hph9_zptijm0lZ2RhEZnY0ZhLpgJLeNJunDxJeLfZ8X7ge2XKW4O1D3a41JnYlFAm3GHdZk_7wsJkISXqQDXLuNjlbm_7sM5aWgBdM9fr0vUI3GONOZiIIiHny-q9PsjAZd7xoUWANsnOxfIaJcKGKk7odEPRiYHb5JNr_VjRHgC7px4_vCtNFA/s2000/New-9-front.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicm98Hph9_zptijm0lZ2RhEZnY0ZhLpgJLeNJunDxJeLfZ8X7ge2XKW4O1D3a41JnYlFAm3GHdZk_7wsJkISXqQDXLuNjlbm_7sM5aWgBdM9fr0vUI3GONOZiIIiHny-q9PsjAZd7xoUWANsnOxfIaJcKGKk7odEPRiYHb5JNr_VjRHgC7px4_vCtNFA/s320/New-9-front.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">要換上的管座</div><br /><p>我覺得這種老管座還是好用,接觸很確實,不用冒著會買到仿冒品的風險。</p><p>比對一下新管座的孔位,差一點點的就用銼刀稍微修一下。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXjvJhMEiNpOE20vnannvTHtjKgUGt35wJ2lKwOnTWkpnHgt2fo0r6vMWB4Hsl9rPOOTM_n8tvhlt20tMt0K-bEVCP1CdNG0czIjL28kzL1HftctfczbdUIzyQcfCuJ68bFC8U16N4xe--m7yGU7_bn2FYOxbPFROMSGe0rNZfOqw_RdCpE7g3dYXwqQ/s2000/replaced.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXjvJhMEiNpOE20vnannvTHtjKgUGt35wJ2lKwOnTWkpnHgt2fo0r6vMWB4Hsl9rPOOTM_n8tvhlt20tMt0K-bEVCP1CdNG0czIjL28kzL1HftctfczbdUIzyQcfCuJ68bFC8U16N4xe--m7yGU7_bn2FYOxbPFROMSGe0rNZfOqw_RdCpE7g3dYXwqQ/s320/replaced.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">新NOS管座換上了</div><br /><p>確認沒有接錯,上電開機,果然原來惱人的接觸不良就消失了,呀比。</p><p> </p><p><br /></p><p><br /></p><p><br /></p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-57712950390570980322023-02-13T17:53:00.003+08:002023-02-14T18:45:28.379+08:00Diysong ARC REF-1 套件隨筆隨拍<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqF5DKMH3G_zermadWbCTj8W81KBFNzOd8PIENXmeTxRh2Dxgi9nNl37SDZ_oMi4eS8MSbsNqpNSTNmhzlSa4ZqBK01uCD-9deL704wMPTEihFL3Vnn-SYCXVxTDhNdhLA0-Jq26I3r_DVkXOR2UB-V6D04dimt2Tm5dXnLJuqxJhmk7DYBZiLpMX5mg/s500/pic.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="261" data-original-width="500" height="167" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqF5DKMH3G_zermadWbCTj8W81KBFNzOd8PIENXmeTxRh2Dxgi9nNl37SDZ_oMi4eS8MSbsNqpNSTNmhzlSa4ZqBK01uCD-9deL704wMPTEihFL3Vnn-SYCXVxTDhNdhLA0-Jq26I3r_DVkXOR2UB-V6D04dimt2Tm5dXnLJuqxJhmk7DYBZiLpMX5mg/s320/pic.jpg" width="320" /></a></div><br /> <p></p><p>Audio Research REF-1前級,是他們家的參考前級。DS李大做了一組套件出來,小的躬逢其盛,幫幾位網友代裝,有一些個人的手順,供大家參酌。</p><p>設計/賣套件其實是很累的事情,尤其在台灣並沒有這樣的市場規模,只能為李大拍拍手,說聲辛苦了。自己裝套件可能是種樂趣,但是代裝就變成了責任與工作,連最後的寄送都要相當小心。</p><p>-----------------------------------------------------</p><p>1. 機箱</p><p>因為機箱的噴漆很厚很耐刮,而且公差很小,所以螺絲可能不大好鎖,請用M3的攻牙器,在螺孔攻牙。若沒有攻牙器,就在螺孔滴針車油潤滑,鎖螺絲進出幾次就順了。機箱蓋的孔也要擴孔,擴到4mm。建議只攻/擴上面四個跟側邊下方的最左跟最右。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg430Jt6latiscqYB8bY5u0FjFfvk1lQ9Urlfkg4ujpr1grMNeWifXtHwuskgSrFJQ1sNWh7keSq-Y3jopSiAkSERXzJswl3W3eEbfUA98-6DJaZwQeyDQ8utuOoD-Do-knz35_ASXVGrg7A-XfF2q2ObL9FQW7RZ-peJpytaALnaTRq0woR-vCzgWTRg/s2000/IMG_0124.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg430Jt6latiscqYB8bY5u0FjFfvk1lQ9Urlfkg4ujpr1grMNeWifXtHwuskgSrFJQ1sNWh7keSq-Y3jopSiAkSERXzJswl3W3eEbfUA98-6DJaZwQeyDQ8utuOoD-Do-knz35_ASXVGrg7A-XfF2q2ObL9FQW7RZ-peJpytaALnaTRq0woR-vCzgWTRg/s320/IMG_0124.jpg" width="320" /></a></div><br /><p><br /></p><p>還有要鑽孔的部分,首先大散熱片要固定在機箱上(以散熱膏熱結合),因爲那個mosfet承受功率非常高。再來鎖變壓器的鐵片,在後面也開孔固定,連同原來的兩孔共四孔,如圖。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWGnxia_rdzaKOSeNWCT2Hs3S-s_yimkSBPmDA1yRbDLdqTioXeAllRHZYMk8NMwiLjDBmcTQT10eGWjkJNTsf06JRGRDupOJTlUa4bhPn4zMGp8eSAr6LtihrXJXEwA3nbdhQ20xkmj_EfF56Nolw6AgQwDjHvFKq7IpWOLnYt1RyGUFMQI8_ywr7Fw/s2000/IMG_0177.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1155" data-original-width="2000" height="185" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWGnxia_rdzaKOSeNWCT2Hs3S-s_yimkSBPmDA1yRbDLdqTioXeAllRHZYMk8NMwiLjDBmcTQT10eGWjkJNTsf06JRGRDupOJTlUa4bhPn4zMGp8eSAr6LtihrXJXEwA3nbdhQ20xkmj_EfF56Nolw6AgQwDjHvFKq7IpWOLnYt1RyGUFMQI8_ywr7Fw/s320/IMG_0177.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMH2wd5hjvzqwe4jFSvxDjctfaBdqGlLedFM9WzcVzmCK-JD_JWdz_FAyzio1aV4X-BdcIFArausbo8wQfKbn04-JjMDP_uR0SIa2JUm3pC25QrpMesUiPWQMfL_txUOer-62CED1iKEuQQrTDYhNxCiJuMDMR_m0LKUkblTdBr9HuP6wM-YeDemFiDA/s2000/IMG_0178.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMH2wd5hjvzqwe4jFSvxDjctfaBdqGlLedFM9WzcVzmCK-JD_JWdz_FAyzio1aV4X-BdcIFArausbo8wQfKbn04-JjMDP_uR0SIa2JUm3pC25QrpMesUiPWQMfL_txUOer-62CED1iKEuQQrTDYhNxCiJuMDMR_m0LKUkblTdBr9HuP6wM-YeDemFiDA/s320/IMG_0178.jpg" width="320" /></a></div><br /><p><br /></p><p>2. 變壓器</p><p>變壓器的燈絲繞組原設計為6.3V穩壓之用,REF-1改成串聯燈絲後,整流之後就剛剛好12V直流,bypass穩壓就可以直接用。我比較假會,用1mm的漆包線加繞6-7圈,讓空載電壓升高到12.X伏特。這樣整流之後就可以有16V的電壓,配合1084這種low-dropout的穩壓IC,很容易調到12.6V輸出。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgRkQbkar27MY-R16urFQ6Ici7FViMOVYmoRMO0UfL_NRnDoGZW9EIrPy-TP4Y_N2nWzKl2-rNk17Iz42rBuCDF1hHvM0pLhAqDFPHxqLabQl1-fDSNddtf8vb17097ZDeXuHrfWWW5zwjuWO_sfxMZGSqsllvOKZS_delj4xoGrnU-ocgZgYman7AFvw/s2000/IMG_9742.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgRkQbkar27MY-R16urFQ6Ici7FViMOVYmoRMO0UfL_NRnDoGZW9EIrPy-TP4Y_N2nWzKl2-rNk17Iz42rBuCDF1hHvM0pLhAqDFPHxqLabQl1-fDSNddtf8vb17097ZDeXuHrfWWW5zwjuWO_sfxMZGSqsllvOKZS_delj4xoGrnU-ocgZgYman7AFvw/s320/IMG_9742.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMINXbu70zJtdktviXvEsYgj0qFJ-Y125QIFjBD_D8LZvfjvp7ykD4PE0eEQ7OfGoHmeTtdJ_WP-tVnXwjE7TyABXIf2j6lKQ_x9oiygsvu0D0u9aGA3vKCVgeXIhdDyrYpNU_WskGTqqSZDkyGPpO0XCxUle4P6DwPiOg4w7BWyQms_42PsT4jyNBFA/s2000/IMG_9743.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMINXbu70zJtdktviXvEsYgj0qFJ-Y125QIFjBD_D8LZvfjvp7ykD4PE0eEQ7OfGoHmeTtdJ_WP-tVnXwjE7TyABXIf2j6lKQ_x9oiygsvu0D0u9aGA3vKCVgeXIhdDyrYpNU_WskGTqqSZDkyGPpO0XCxUle4P6DwPiOg4w7BWyQms_42PsT4jyNBFA/s320/IMG_9743.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9XW6gQzcH6qrHd6zSivCCaG2k2koB0X3dp0ST4j6srDBVxc_mbAW0v2CrwZjRAKheScVt8JtT48t3TBvx1bO9oSX26clNnsgIogjW0Fc8aB5dd7yjf-HpbfTIJmNhV1Gm-I-UpEJhr4d1wZpsaKidD_GlIP8ZECZQrbpGFRWdo2EfOQaSeBJWiBe39A/s2000/IMG_9744.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9XW6gQzcH6qrHd6zSivCCaG2k2koB0X3dp0ST4j6srDBVxc_mbAW0v2CrwZjRAKheScVt8JtT48t3TBvx1bO9oSX26clNnsgIogjW0Fc8aB5dd7yjf-HpbfTIJmNhV1Gm-I-UpEJhr4d1wZpsaKidD_GlIP8ZECZQrbpGFRWdo2EfOQaSeBJWiBe39A/s320/IMG_9744.jpg" width="320" /></a></div><br /><p><br /></p><p>3. 電源供應板</p><p>R2 - 200R/3W 改 680R/5W 以減低穩壓MOSFET消耗功率,我算過高壓的靜態電流差不多就要65-70mA,適度降低MOS的輸入電壓好像比較好。</p><p>回授分壓電阻13K並連一個220K,讓穩壓值接近原廠的178V。</p><p>110V 負壓的第一個電解電容可以換150V以上大容量(470uF-1000uF)的,減少漣波。</p><p>燈絲墊高電阻並電容,22uF~100uF/75V以上皆可。</p><p>(以下兩項,若未加繞燈絲繞組,可略過)</p><p>燈絲的整流二極體換成Schottky 2A規格 ,減少壓降。</p><p>R16/17對調,R18/19對調。如此配合可以調整穩壓到12.6V。</p><p><br /></p><p>4. 輸入輸出選擇板</p><p>所有零件與RCA頭焊好之後,就要先單獨上電測試,檢查每組輸入/輸出是不是都正常導通,正訊號跟負訊號都要測,因為再來就要焊線裝在機箱上了,若有疏漏或故障會很麻煩。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilSk9ynuztZy40M9l0wyfhrqRABBKAwcn1ae-muJhJgZUH5BYonvn_53cJVfdB3DQZ0OAkvUyT-bjRJJmSkp4dGRUKib9qe5S0SC2DnbYBEfsT8ZlWaEnSary0yjS4ukVNnOOyYsp_atbBPq5_ewvJeWtielMA3EefI9hRnaldm8pOcqMDtoX-nG3RAQ/s2000/IMG_0127.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="946" data-original-width="2000" height="151" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilSk9ynuztZy40M9l0wyfhrqRABBKAwcn1ae-muJhJgZUH5BYonvn_53cJVfdB3DQZ0OAkvUyT-bjRJJmSkp4dGRUKib9qe5S0SC2DnbYBEfsT8ZlWaEnSary0yjS4ukVNnOOyYsp_atbBPq5_ewvJeWtielMA3EefI9hRnaldm8pOcqMDtoX-nG3RAQ/s320/IMG_0127.jpg" width="320" /></a></div><br /><p>5. 主放大板</p><p>連接前面兩支管子陰極的R170/R171-10K電阻共四支,請改成兩瓦(至少一瓦)。經過這四支電阻的電流約7-8mA。</p><p>+/-輸出部分加1.5M對地電阻。</p><p>DN2540-N3調整偏流的MOS,D-S極並聯470p-1000pF電容。</p><p>+/-輸入電阻可改1uF電容,柵極(V1的二腳/七腳)請接100k-47k電阻下地。</p><p>然後偏流調整那邊,我會先把DN2540-N3的D極調到-80v左右,再來就測量第一支管的陰極對地電壓是否在0.4v以上,太低的話會有柵流。如果可以調到0.5-0.7是最好。調ㄧ邊,另一邊陰極電壓也會跟著動。如果想跟原廠一樣使用6922/6DJ8系列管,必須重調偏流,有可能需要更改DN2540-N3的GS電阻值。</p><p>輸入輸出的正負訊號請參考圖片標示。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgef3ovhYX7GBIxdQFKVgSV5U0a5bwJVKhEsOZGV3jBgYkaCQn4K-CVRAVj9f9ATiLgaRQDWhJhCtUjcXWMPgefWborVWohOIO7D3Ztc9lsCFS4c6hF3d5KeRYYXy5YhMA9vzx7V1LMYHREv4Su618ODi2XYFQHzKPqVONwz11iesWS-LRkYq-Us3Je6g/s2100/IMG_E0196.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1575" data-original-width="2100" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgef3ovhYX7GBIxdQFKVgSV5U0a5bwJVKhEsOZGV3jBgYkaCQn4K-CVRAVj9f9ATiLgaRQDWhJhCtUjcXWMPgefWborVWohOIO7D3Ztc9lsCFS4c6hF3d5KeRYYXy5YhMA9vzx7V1LMYHREv4Su618ODi2XYFQHzKPqVONwz11iesWS-LRkYq-Us3Je6g/s320/IMG_E0196.jpg" width="320" /></a><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpGCTVwkJNF5I4LayfnHZzw_uIgibiK9PGgqlmEz4UHn8tnKfokQgeYSWCdG1gFK5kmJlvXS59tRpWr9Jh6W7O-o72B8UEjA5inSMRaP0Hsgoh-Oe85YViFCNQSi4hf0fET9leB17L02S3ORhrQjB0hDZ3dhVSIJn76AHaUOXMk0NZuZRiDJXFqTDzuw/s2000/IMG_0197.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpGCTVwkJNF5I4LayfnHZzw_uIgibiK9PGgqlmEz4UHn8tnKfokQgeYSWCdG1gFK5kmJlvXS59tRpWr9Jh6W7O-o72B8UEjA5inSMRaP0Hsgoh-Oe85YViFCNQSi4hf0fET9leB17L02S3ORhrQjB0hDZ3dhVSIJn76AHaUOXMk0NZuZRiDJXFqTDzuw/s320/IMG_0197.jpg" width="320" /></a></div><br /></div><br /><p>插上6N1-P管子之後,要稍微注意管子的狀況,我有遇到燈絲有問題的管子,像下圖,很明顯它就不太亮而另一隻非常亮,那就要換掉。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7UKzleFeoAoQGBTXMHwyyRvvqtWfCYVdIJpP1pw1CwHsPiBtGwVLcPjgjTbDPmbT71olLQ9n-2jQLkiBK7tfw7zNGByiG54XlTKyTkTGSpArMrDpt2Tq6JVU_tRbr-jS01bYP36xsVAnaKjORo0bK5AFyuTfemD3Xtm4J2pTGMBPNA8hjqYw0RJofRQ/s2000/IMG_0291.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7UKzleFeoAoQGBTXMHwyyRvvqtWfCYVdIJpP1pw1CwHsPiBtGwVLcPjgjTbDPmbT71olLQ9n-2jQLkiBK7tfw7zNGByiG54XlTKyTkTGSpArMrDpt2Tq6JVU_tRbr-jS01bYP36xsVAnaKjORo0bK5AFyuTfemD3Xtm4J2pTGMBPNA8hjqYw0RJofRQ/s320/IMG_0291.jpg" width="320" /></a></div><br /><p>以下先賞圖。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLJOcyQRG4ioZwV5v_zdW8PaXwP447sdy0j89OTClDCyDxjk1ZdyYqHd-pYfXvb-65By54hezdWkiYR_qqaw466lkVbbsKRtECHOZM7rjUIHSFW1bQk8aMGftjNZS9XKG8DCqvUH2GdX9V1GjtLsprlx6pXw5p34t4sYtkmxyJ5GpOxDpioj44mO-2Mw/s1621/IMG_0087.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="1621" height="296" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLJOcyQRG4ioZwV5v_zdW8PaXwP447sdy0j89OTClDCyDxjk1ZdyYqHd-pYfXvb-65By54hezdWkiYR_qqaw466lkVbbsKRtECHOZM7rjUIHSFW1bQk8aMGftjNZS9XKG8DCqvUH2GdX9V1GjtLsprlx6pXw5p34t4sYtkmxyJ5GpOxDpioj44mO-2Mw/s320/IMG_0087.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikbYmaRMmrC7QjCP2YtWHe0Qh1wAflBy8RQHkqCmSylALpKMOoaNHlFKpcaDvW1ZkRKrAaEIHT9WAfZ-DZ4Fe2_AXQOt7rPRSr3Ie8fKTrYQ6DBV7bKXKxwhYrJEc7OS-MvDIChxoVpRWphMInEFJR3FWdUaKD9muaevhw-mLzURIWwMEzJFLFG3AkTA/s2000/IMG_0088.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="906" data-original-width="2000" height="145" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikbYmaRMmrC7QjCP2YtWHe0Qh1wAflBy8RQHkqCmSylALpKMOoaNHlFKpcaDvW1ZkRKrAaEIHT9WAfZ-DZ4Fe2_AXQOt7rPRSr3Ie8fKTrYQ6DBV7bKXKxwhYrJEc7OS-MvDIChxoVpRWphMInEFJR3FWdUaKD9muaevhw-mLzURIWwMEzJFLFG3AkTA/s320/IMG_0088.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;">特製高級鋁面板</span></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguPJN87B7qvX36EZ8Cb3TmKx4ZX0-qDcwG1KUJZ--8Ln8v7aQdQ7WMvIQ15kRLPc59P1ahY49apDITM9zVIFMWn-gTI69_criPMAA9K060OJ9ZtUg8G9y933vccMA41bIu4HgMU6FkZOOQFp5bhjt7TIje5AnX22t1OLuaXlynr1Yifwk7Hy2cMy1dQQ/s2000/IMG_0120.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1582" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguPJN87B7qvX36EZ8Cb3TmKx4ZX0-qDcwG1KUJZ--8Ln8v7aQdQ7WMvIQ15kRLPc59P1ahY49apDITM9zVIFMWn-gTI69_criPMAA9K060OJ9ZtUg8G9y933vccMA41bIu4HgMU6FkZOOQFp5bhjt7TIje5AnX22t1OLuaXlynr1Yifwk7Hy2cMy1dQQ/s320/IMG_0120.jpg" width="253" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj3OGHCMOTnKMwipdigtUNXBmd7EfBwDvX6St7CxZO4CvKCznlrU9mYRIQ6duSg5fiod6M-ogcHA-2TWdqf6diYpWfMSub6h4Bdl9m-y-kdWOrT7Um-HukUYly8xdxrMvf6nVdB2kjmFCFeOJJdH8JPuYHFwyU_U6c5fb1fSZs5pgNYZuLISJgQnA450w/s2000/IMG_0121.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1209" data-original-width="2000" height="193" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj3OGHCMOTnKMwipdigtUNXBmd7EfBwDvX6St7CxZO4CvKCznlrU9mYRIQ6duSg5fiod6M-ogcHA-2TWdqf6diYpWfMSub6h4Bdl9m-y-kdWOrT7Um-HukUYly8xdxrMvf6nVdB2kjmFCFeOJJdH8JPuYHFwyU_U6c5fb1fSZs5pgNYZuLISJgQnA450w/s320/IMG_0121.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">不鏽鋼面板</div><br /><p>音量鈕周圍有一些突出的地方,可以拿刀片修掉。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIZ1kdf_drfW4r3FWV_4TIbYDr9SQeHfCkYHd2TWFcGNrDQNFDBWMfCeY4ENmuNAVi17Q1WIfJn05jrg2BUj0tIgZZb775K50n2k-rp1GWTtF-4aZ3HcebTHTcLp86jei4L9xDNzNeEcXT3eupa-q9HK9dDOQN-Bt0mBHUghWCe63BbcPpkM5Clm8_dA/s2000/IMG_0200.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIZ1kdf_drfW4r3FWV_4TIbYDr9SQeHfCkYHd2TWFcGNrDQNFDBWMfCeY4ENmuNAVi17Q1WIfJn05jrg2BUj0tIgZZb775K50n2k-rp1GWTtF-4aZ3HcebTHTcLp86jei4L9xDNzNeEcXT3eupa-q9HK9dDOQN-Bt0mBHUghWCe63BbcPpkM5Clm8_dA/s320/IMG_0200.jpg" width="240" /></a></div><br /><p>訊號測試。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKzRCVD0vf0jj5zd_xG1Xai_Mr73BZ5pBAcPslFajTnUa4Z97eopFoXHWVkivXgYwwQ1h0PWqv5lZNRw8UPV-4-0N7CHQqerlVGb4P15XJoc9pscnc0DOgcKt5sgHkWy-rE4KKpgedrEp3HWqo6GX2R4NHqiSwukoM-kQCcFN9LjadkjovGhu2xLusrw/s2000/IMG_0303.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2000" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKzRCVD0vf0jj5zd_xG1Xai_Mr73BZ5pBAcPslFajTnUa4Z97eopFoXHWVkivXgYwwQ1h0PWqv5lZNRw8UPV-4-0N7CHQqerlVGb4P15XJoc9pscnc0DOgcKt5sgHkWy-rE4KKpgedrEp3HWqo6GX2R4NHqiSwukoM-kQCcFN9LjadkjovGhu2xLusrw/s320/IMG_0303.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjebkP9FL4tvgivCW2AzVqOuq8tytzsCa4oXg_5zwFno0UGG2iTel_vVH1mzJTjztKEQFje1UwYpGuIWK_x_zchBtr9DWxplTZgMStNaWFJtunQb6NXoMHLQ2Bo-zd9bXWRb6dq7cHg5HgPhd_bNMtEiRDL_O6qqSXAx827KZOjKlD-LLGWnr-cGi5T3Q/s2000/IMG_0304.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1535" data-original-width="2000" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjebkP9FL4tvgivCW2AzVqOuq8tytzsCa4oXg_5zwFno0UGG2iTel_vVH1mzJTjztKEQFje1UwYpGuIWK_x_zchBtr9DWxplTZgMStNaWFJtunQb6NXoMHLQ2Bo-zd9bXWRb6dq7cHg5HgPhd_bNMtEiRDL_O6qqSXAx827KZOjKlD-LLGWnr-cGi5T3Q/s320/IMG_0304.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjRB-p9AorpIoYQLgzSgdHlZAWtI8f53-41xFgtUOqNmF9uygrzOyOFTs0lbnAxbOiPdATSKfilSftXIC4giK9QJhB6cSFTneMEALEcrw-ZVtvfslgbi8UcecU4R0f31_0G4Pywlu6vgu0x3CqJBS7WEFW1U73apULJbWahZSEDBqV2s6AkjHh1_Mc6w/s2000/IMG_0308.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjRB-p9AorpIoYQLgzSgdHlZAWtI8f53-41xFgtUOqNmF9uygrzOyOFTs0lbnAxbOiPdATSKfilSftXIC4giK9QJhB6cSFTneMEALEcrw-ZVtvfslgbi8UcecU4R0f31_0G4Pywlu6vgu0x3CqJBS7WEFW1U73apULJbWahZSEDBqV2s6AkjHh1_Mc6w/s320/IMG_0308.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">正負訊號輸出</div><br /><p>因為我沒有全平衡的訊源跟後級,就用音頻變壓器分相。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-0CzrpmzqaMMkQ_CyNxAR4zhEVkjYjDYJ4l2-WdJfpUEpvBg7lOZq5mlDJKkUtes2TkccvB7roJ2cfaa0UHDPC9XGVYTshPnNIhyyE_nvD5-5sHp37lNGmdr-pVWrLz3It231G4bqhIsIoS_gmOhCz1ZP4uwb4CozM0ZZFiiUHcij1rCDodBOfAzDPg/s2000/IMG_0062.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1219" data-original-width="2000" height="195" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-0CzrpmzqaMMkQ_CyNxAR4zhEVkjYjDYJ4l2-WdJfpUEpvBg7lOZq5mlDJKkUtes2TkccvB7roJ2cfaa0UHDPC9XGVYTshPnNIhyyE_nvD5-5sHp37lNGmdr-pVWrLz3It231G4bqhIsIoS_gmOhCz1ZP4uwb4CozM0ZZFiiUHcij1rCDodBOfAzDPg/s320/IMG_0062.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhLsBiWa4H9Da2MzgzWVionhucn_R_pleiA_ys7dmdukckGCRghQGVFzI8XU1EyzjDrp436CMAeFUg6gzeDTPxsPjQPw1FHdbJm18kG010SYi8goXvOUPmFjMZL6gyZwAPZu20L_8yrFdYoQzGIvBfmz3MHTy9s76r85C3pVGDqBfrDD6DOcKUt3GIyA/s2000/IMG_0309.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1638" data-original-width="2000" height="262" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhLsBiWa4H9Da2MzgzWVionhucn_R_pleiA_ys7dmdukckGCRghQGVFzI8XU1EyzjDrp436CMAeFUg6gzeDTPxsPjQPw1FHdbJm18kG010SYi8goXvOUPmFjMZL6gyZwAPZu20L_8yrFdYoQzGIvBfmz3MHTy9s76r85C3pVGDqBfrDD6DOcKUt3GIyA/s320/IMG_0309.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">所以方波正負輸出有鈴振是正常的</div><br /><p>特製銀線/Mundoff電容/低溫度係數電阻版</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglHlnZlEGFz4P8yw8iIHUxl4F06z50f6rYpZZJYGFDaJEQyiTFBEAlzl4HWbJmTZhnLIQXRH3JIbft5QecvQ5Z5Zr4xaDd4paJws4RoXHFSaAkC2zg519TZNLBXQupsCUBqIt_De1JUYvO2VloXMu0WPqo0INAV3Ro6qEZCb8cYcZLvEQbDvhxkdn1Hw/s2000/IMG_0198.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglHlnZlEGFz4P8yw8iIHUxl4F06z50f6rYpZZJYGFDaJEQyiTFBEAlzl4HWbJmTZhnLIQXRH3JIbft5QecvQ5Z5Zr4xaDd4paJws4RoXHFSaAkC2zg519TZNLBXQupsCUBqIt_De1JUYvO2VloXMu0WPqo0INAV3Ro6qEZCb8cYcZLvEQbDvhxkdn1Hw/s320/IMG_0198.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqbydc3SmscyMWXGoj62ethgNaiV553VhaW13NYTUqPQwtLVtaTOhVfqGt-i3Cgwg_Jq5bM-P8F3fQ7oRT8-0qWNE7uUv4zIV00wBqVlvrM-EwoZMVLrmRPUVYAltLWpjhzq2treLzGl49416XWwbaQGhiwm1K0BQnDen-JWZr1ZXu4dMe6yVB4MjpkA/s2000/IMG_0243.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqbydc3SmscyMWXGoj62ethgNaiV553VhaW13NYTUqPQwtLVtaTOhVfqGt-i3Cgwg_Jq5bM-P8F3fQ7oRT8-0qWNE7uUv4zIV00wBqVlvrM-EwoZMVLrmRPUVYAltLWpjhzq2treLzGl49416XWwbaQGhiwm1K0BQnDen-JWZr1ZXu4dMe6yVB4MjpkA/s320/IMG_0243.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhe-Shepevw2AF-u5a5GKD-Z0qiNOR6mTQwSb2jVhm1hw8LSSAHa4AeNsyvzmqae126wVLoZJnbmkd-cJpr5k3Gna3v9zCZnO7G_bT74Qg8f8N8FWoaCSDixViatsj2npf-nxvDXMFzUBPNQaqc_hHR0WJM9XPBy-WUCPwZHp2qAq7HyUunjBDjXV7X5A/s2000/IMG_0241.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhe-Shepevw2AF-u5a5GKD-Z0qiNOR6mTQwSb2jVhm1hw8LSSAHa4AeNsyvzmqae126wVLoZJnbmkd-cJpr5k3Gna3v9zCZnO7G_bT74Qg8f8N8FWoaCSDixViatsj2npf-nxvDXMFzUBPNQaqc_hHR0WJM9XPBy-WUCPwZHp2qAq7HyUunjBDjXV7X5A/s320/IMG_0241.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div>平衡遙控音量版<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhUBexHATNePOLciMT4mitZLcd4MLt6_cd996s13WskdivadcqndURsRzOZGKmkIOwyZL7ftejkACkLlMotcCby4ltDVk6kuozXu7u2Okj3lHBwxxjEVkLa1Z5OsM054ZKmdWMLVFKn17wNwmTQiihDyWKh3C9XAcrsXbTfLgf7h43QSximhkyY1WBYkA/s2000/IMG_0341.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhUBexHATNePOLciMT4mitZLcd4MLt6_cd996s13WskdivadcqndURsRzOZGKmkIOwyZL7ftejkACkLlMotcCby4ltDVk6kuozXu7u2Okj3lHBwxxjEVkLa1Z5OsM054ZKmdWMLVFKn17wNwmTQiihDyWKh3C9XAcrsXbTfLgf7h43QSximhkyY1WBYkA/s320/IMG_0341.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCLFGKt99qbiZDfjg4pE3WKa3YLZYIFSPGyHq8oSRFZnsK1MZeBBcM-_xHqLCWpjScRai6yaapQESAwO97umWHx235ePr2BYKhdeGYvogjoanVQNK8CJ1CIw5DhQfzImw9XgG0WS8gy1Y0zXFfW7lrCkqAAcGAGWRqpdrIBxDohggFWxPbyd-8ugvZSA/s2000/IMG_0342.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCLFGKt99qbiZDfjg4pE3WKa3YLZYIFSPGyHq8oSRFZnsK1MZeBBcM-_xHqLCWpjScRai6yaapQESAwO97umWHx235ePr2BYKhdeGYvogjoanVQNK8CJ1CIw5DhQfzImw9XgG0WS8gy1Y0zXFfW7lrCkqAAcGAGWRqpdrIBxDohggFWxPbyd-8ugvZSA/s320/IMG_0342.jpg" width="320" /></a></div><br /><div><br /><p>6. 寄送</p><p>因為變壓器足斤足兩,雖已加強固定,仍不敢造次,除了在固定片後面也加拉固定,內部也塞緊緩衝材,以保運送時的摔震風險。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjn-_wiM0EUQ5bDMhAdCq56YAPbcV1OnsKUW1x7O6uw06MxkJex5H0-iT8htj6fV8Q1MwTGpmZEowfrYj8xdtTcz-fgxAzGktiXZkQ9zFBdouUiR0xT9w1OilF82WedLtDgZEyT9YhrWNGO3ea-6dOjGw2WT4HGGDxPRaUbhzHYj_jAhjYiNX404jwWDQ/s2000/IMG_0179.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjn-_wiM0EUQ5bDMhAdCq56YAPbcV1OnsKUW1x7O6uw06MxkJex5H0-iT8htj6fV8Q1MwTGpmZEowfrYj8xdtTcz-fgxAzGktiXZkQ9zFBdouUiR0xT9w1OilF82WedLtDgZEyT9YhrWNGO3ea-6dOjGw2WT4HGGDxPRaUbhzHYj_jAhjYiNX404jwWDQ/s320/IMG_0179.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKh4gYW66XeXIw1sT8Ul7fUl8r15FeffCIYJnw016gj4DXfwU0vvWPBFUUE_HEQSx1kFsop-yPufA0xdaXwiNJQWq8bti-P24QgkzlUYJyTCI88xOGDgrWCKjx5VtRckofTGgZ6dTdzL7xq9Wcip034bcO-kKIrED1wpn2k2usawR92Wdj-bRbL1XU4w/s2000/IMG_0180.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKh4gYW66XeXIw1sT8Ul7fUl8r15FeffCIYJnw016gj4DXfwU0vvWPBFUUE_HEQSx1kFsop-yPufA0xdaXwiNJQWq8bti-P24QgkzlUYJyTCI88xOGDgrWCKjx5VtRckofTGgZ6dTdzL7xq9Wcip034bcO-kKIrED1wpn2k2usawR92Wdj-bRbL1XU4w/s320/IMG_0180.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjq7h93aGaW2cfDemccodXRMFbuamj0FK38d4pwperCEH9uxZjpHc_8Vy_K9E3_aK13LkW-79NtX3Cded1qrZEGs2t48ieU48hSq00LejlEqD825kQ-NXoENnFC00FwlMEdxnIbp-OIsntiueZ3HXPI1_l1jQdn4IXCm8p3CKTE2pHs40Oxuiy0yVVaTQ/s2000/IMG_0343.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjq7h93aGaW2cfDemccodXRMFbuamj0FK38d4pwperCEH9uxZjpHc_8Vy_K9E3_aK13LkW-79NtX3Cded1qrZEGs2t48ieU48hSq00LejlEqD825kQ-NXoENnFC00FwlMEdxnIbp-OIsntiueZ3HXPI1_l1jQdn4IXCm8p3CKTE2pHs40Oxuiy0yVVaTQ/s320/IMG_0343.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><p>報告完畢~~~~</p><p><br /></p></div>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-13162551054677970372022-12-18T16:42:00.002+08:002022-12-19T17:58:30.906+08:00 Sony TA-88 綜合擴大機 修持<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQEqC2ERTX5JOSMUhTwSUCqCSc3YcNtq8fvJm4uf4z6nNbE7bynCL4mQdH0JrBOwfsdAXsye-HsWqPoKU7UGUaVrAGb66Q-SQ3i945tAX-52o6inYZriTA5iJ7LPZvEBNH7yw7vq62rRPHWEwDCYmoneFQgOqoh866N5wxi4rWmilwgdv-3pmDdaW_0Q/s959/ta88-solo.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="959" data-original-width="733" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQEqC2ERTX5JOSMUhTwSUCqCSc3YcNtq8fvJm4uf4z6nNbE7bynCL4mQdH0JrBOwfsdAXsye-HsWqPoKU7UGUaVrAGb66Q-SQ3i945tAX-52o6inYZriTA5iJ7LPZvEBNH7yw7vq62rRPHWEwDCYmoneFQgOqoh866N5wxi4rWmilwgdv-3pmDdaW_0Q/s320/ta88-solo.jpg" width="245" /></a></div><br /><p>這部機器初生產於1972,至今恰恰好滿五十年。它立式造型的設計在擴大機中鶴立雞群,而且結構與線路簡單但不隨便,易於保養維護。搭配同樣尺寸的收音機ST-88以及四聲道解碼器SQA-100(已經沒有人在用當時的四聲道了吧),就可以建構出一個小而美的音響世界。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3-xhg8iXr50ms2zvStUa2rZPHhW0JJ-hrmdaiRlh8JifMhZ7V37bEfyNM3ka63obgHTo-oHYDEIaJos2LOnI3Lfzh7y7ZPy7ilFr6mrs-6i519_xqnZp1oveBRKwarygdXXUvV_laLqsNQK4b5X6T0r-iOK06YDeSE1qUOHa199GILC8WTNf9YzUa2A/s646/ta88-friends.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="624" data-original-width="646" height="309" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3-xhg8iXr50ms2zvStUa2rZPHhW0JJ-hrmdaiRlh8JifMhZ7V37bEfyNM3ka63obgHTo-oHYDEIaJos2LOnI3Lfzh7y7ZPy7ilFr6mrs-6i519_xqnZp1oveBRKwarygdXXUvV_laLqsNQK4b5X6T0r-iOK06YDeSE1qUOHa199GILC8WTNf9YzUa2A/s320/ta88-friends.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjm05AeOoGEIYbOCBeercHULspH5U3d3SCgw_9kyU3PbsSth77_vvbo0-ixTi3czyDtQ1XJ5vEzUBFoA1deAme_9JV7NVJkKQlaSSTEkndGe-8rfg9a8LLhhFMTXmQtlEASILZrM26aGCHYq1ClVTOLiI2BX67OuFifKcNILs1eKc3YRQhQLdOQkj_G0g/s600/SonyTA88blog.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="456" data-original-width="600" height="243" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjm05AeOoGEIYbOCBeercHULspH5U3d3SCgw_9kyU3PbsSth77_vvbo0-ixTi3czyDtQ1XJ5vEzUBFoA1deAme_9JV7NVJkKQlaSSTEkndGe-8rfg9a8LLhhFMTXmQtlEASILZrM26aGCHYq1ClVTOLiI2BX67OuFifKcNILs1eKc3YRQhQLdOQkj_G0g/s320/SonyTA88blog.jpg" width="320" /></a></div><br /><p><br /></p><p>網路使用者短評:</p><p>"它可能只有10瓦,但如果使用合適的喇叭(我目前使用的是 Klipsch B20),它們就非常棒了。40多年來,我買賣過大量設備,包括一系列 A類管機和晶體機,這是我一直以來的最愛之一。 它溫暖而引人入勝,是對工程師們在70年代取得的成就的致敬。在美學上令人愉悅,在聲學上脫穎而出。"</p><p>"這個擴大機聽起來很棒! 只有13瓦,但聽起來非常有力,而且……非常自然和直接。很多擴大機確實聽起來含蓄而且太奶油,但這個不是。"</p><p>"我一直想知道人們所說的擴大機有靈魂和情感是什麼意思?這個小擴大機有那個。聽起來非常溫暖,充滿靈魂和情感。它告訴我們音樂聽起來應該是什麼樣的。忘記偉大的動態,為之而死的低音,明顯的中音和柔滑的高音。坐下來享受音樂,我可以向你保證,你不會覺得音樂中缺少任何東西。"</p><p><br /></p><p>規格:</p><p>生產年份: 1972</p><p>生產國: 日本</p><p>功率: 13W/8Ω ; 18W/4Ω (立體聲時每聲道) </p><p>頻率響應: 15Hz to 50kHz</p><p>輸入靈敏度: 3mV (MM唱頭), 250mV (高電平)</p><p>信號雜訊比 60dB (MM唱頭), 80dB (高電平)</p><p>輸出: 喇叭端子-4~16Ω ; 耳機 - 8~10kΩ</p><p>錄音輸出: 250mV (高電平), 30mV (DIN)</p><p>阻尼因數: 35 @ 8Ω</p><p>尺寸: 130 x 230 x 165mm</p><p>重量: 3.2kg</p><p><br /></p><p>============================================================</p><p>之前就對這部小擴大機很有興趣,但我孤陋寡聞,沒在台灣看過它。剛好有個朋友聽了我的讒言,也對他很有興趣,就託我幫他尋找。三不五時有空在網路上看看,一陣子之後被我在極樂海灣(另譯魔鬼灣XD)上找到一部品相還算不差的TA-88,賣家當故障品或是零件出售,他形容一個聲道的聲音混濁,另一聲道完全無聲。我看了一下他發的照片,發現它一個聲道的喇叭輸出沒裝保險絲,猜測只是少保險絲才不出聲,我就把它標了下來。後來賣家一直無法搞定寄送國外的步驟,於是麻煩我女朋友的友人,在國外收件,再幫我寄了回來。在此特別感謝右老闆的幫忙。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBS5hpUwPL8yF2hrCQaTSkANCkY16acGFQamJkHRzr3KB_1AD1fogBGkv0zG74n676Y1McOMGFEKvFJmuB0oqfh8Qp4zlBFsHJwUrdE5H6haruGvzrg78wYnTv-qAXxM07GDgRLqQIsQtADvwFR8E-sKpzv0KGTCxTXL6PlC4fZzPib2ExetoPxczJZg/s2000/ontable.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1472" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBS5hpUwPL8yF2hrCQaTSkANCkY16acGFQamJkHRzr3KB_1AD1fogBGkv0zG74n676Y1McOMGFEKvFJmuB0oqfh8Qp4zlBFsHJwUrdE5H6haruGvzrg78wYnTv-qAXxM07GDgRLqQIsQtADvwFR8E-sKpzv0KGTCxTXL6PlC4fZzPib2ExetoPxczJZg/s320/ontable.jpg" width="236" /></a></div><p>收到後打開層層嚴密的防撞包裝,看看它,真是很特別的機器設計。木框外殼,四個滑動音量,分別是左聲道,右聲道,高音,低音。旋鈕控制輸入信號phono/tuner/aux,面板上的指示燈會同步亮起。最底下是耳機輸出,高音衰減(減少收音機或黑膠唱盤的hiss聲),立體聲/單音,訊源/卡帶切換,沒有贅物,設計跟工藝都沒話說。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnfx41hWaJJSzfYrPhO21n9wCpCdH9oABIjgVOWuOe4LWmm51Q29vhIJiNzBK0q-tniHUlhcd-Y1Z1dNUyo_Hw04HRkCK7q24Px498n2Vn3qbcz9Zu1uevXTG2vR77x9Oz_J1eQ0pDs1H5fO4Zm-7Nxh9zqelXLLTrIEyOTVnrpfKqt-ik1b925QcVkg/s2000/TA-88-45half.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1628" data-original-width="2000" height="260" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnfx41hWaJJSzfYrPhO21n9wCpCdH9oABIjgVOWuOe4LWmm51Q29vhIJiNzBK0q-tniHUlhcd-Y1Z1dNUyo_Hw04HRkCK7q24Px498n2Vn3qbcz9Zu1uevXTG2vR77x9Oz_J1eQ0pDs1H5fO4Zm-7Nxh9zqelXLLTrIEyOTVnrpfKqt-ik1b925QcVkg/s320/TA-88-45half.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgtbv4MlFvepNpgr3JSfwIrbqZ4K5l_YOiT1vhYjEm5TKQxZUuARnqGGgcR9V3Bua_nBZiQRGd0-q_oMAJtglSUaVKqNqynYRLhu0p2l_ptae4cp5MuL-XaxGsbXsRL7L5UW9NGoDtEmqfClLlPhPyC9OVwkcszCxUgmSO7rftSJ0J5Y80EyV5AmXDzyA/s2000/TA-88-switch.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1335" data-original-width="2000" height="214" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgtbv4MlFvepNpgr3JSfwIrbqZ4K5l_YOiT1vhYjEm5TKQxZUuARnqGGgcR9V3Bua_nBZiQRGd0-q_oMAJtglSUaVKqNqynYRLhu0p2l_ptae4cp5MuL-XaxGsbXsRL7L5UW9NGoDtEmqfClLlPhPyC9OVwkcszCxUgmSO7rftSJ0J5Y80EyV5AmXDzyA/s320/TA-88-switch.jpg" width="320" /></a></div><br /><p>心裡已經有了打算,那就是50年的機器,電容勢必都壽命已盡,所以全機的電解電容我都會更換,換了以後再看有沒有晶體部分的故障。當然動手之前,依例好好下載電路圖,維修手冊,先研究並列出要更換的電容數值與數量,備料好之後就可以開工了。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhogvrz9fy0_WZAmvl3dbLpf1HIPPlCR3BQ6DE8p1FYPOBDQMGJD7wBRYhjmUyBZVTwu6rrzszRSdrgH_TN3pdPQG3EUTjUwiySAeO6wGgZ_6Nj4jFEDgcKEQn-DPnESCLX_opfRNNRH2l4-nPZNadrHI7Wnol0X_3f6Zn8IfUgP8TIe4fPgMzuXcINwA/s2000/stripped.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1450" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhogvrz9fy0_WZAmvl3dbLpf1HIPPlCR3BQ6DE8p1FYPOBDQMGJD7wBRYhjmUyBZVTwu6rrzszRSdrgH_TN3pdPQG3EUTjUwiySAeO6wGgZ_6Nj4jFEDgcKEQn-DPnESCLX_opfRNNRH2l4-nPZNadrHI7Wnol0X_3f6Zn8IfUgP8TIe4fPgMzuXcINwA/s320/stripped.jpg" width="232" /></a></div><p style="text-align: center;">依序先拆下木框,旋鈕及開關,面板之後,小工藝品變成小機器人,可愛。</p><p style="text-align: center;"><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjigEn6htBQS3dnnzw1GT8zSYD6hBI6m3NwqV4TOCymiZmKqJctiPaDqn3MW8fDJ6qea003gdGlbxFcV6Y1y-uvkKZxPoy5wJVg9JjAkbtH6PzSeLhPQlRTEdisQ23fT92BbCQFjg_FedHqZ3PzrqNIVsjtkbkRQfCmLOKa4CHVz2qghPw-rgssSNOcpQ/s2000/preamp.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjigEn6htBQS3dnnzw1GT8zSYD6hBI6m3NwqV4TOCymiZmKqJctiPaDqn3MW8fDJ6qea003gdGlbxFcV6Y1y-uvkKZxPoy5wJVg9JjAkbtH6PzSeLhPQlRTEdisQ23fT92BbCQFjg_FedHqZ3PzrqNIVsjtkbkRQfCmLOKa4CHVz2qghPw-rgssSNOcpQ/s320/preamp.jpg" width="240" /></a></div><p style="text-align: center;">這一邊是前級的PCB,包含了唱頭放大跟前級與音調線路。</p><p style="text-align: center;"><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSb-bxWj18UT-xt4Pku864J4p1O-YjYY_N0Piv6T6Ve0Uo2kjDu7gIksas0sU3nTBaEhFKx0pmdR5j2spJPbOolfwA0Q7l62Qoqsjp3LlnT9czNvZOD5kfE3nxMHBVHYzSwbtDTxlKxcL6npyvMqVaWICbnL4kZIFeCoplOT81GRo7uVJfzeUX-HuK4Q/s2000/amp.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSb-bxWj18UT-xt4Pku864J4p1O-YjYY_N0Piv6T6Ve0Uo2kjDu7gIksas0sU3nTBaEhFKx0pmdR5j2spJPbOolfwA0Q7l62Qoqsjp3LlnT9czNvZOD5kfE3nxMHBVHYzSwbtDTxlKxcL6npyvMqVaWICbnL4kZIFeCoplOT81GRo7uVJfzeUX-HuK4Q/s320/amp.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjT9cDYodYLZWUdHboFtyvXZsn0Ryxa9MeoWm9Cb8dRoYCJH3rSQaPy13RbNzL5hAV2reBIilhA4yG4GJUeddRvEx5oXYEFSpyN7_eEfKp2EuH7PakEFuPnv9MTUWMd9dxuW7Knn9FGHFs-2X-DMM-GFfF2QCMl0KnOjyMKVaT7beSrFt_xTPeG2bIE0w/s2000/linkage.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjT9cDYodYLZWUdHboFtyvXZsn0Ryxa9MeoWm9Cb8dRoYCJH3rSQaPy13RbNzL5hAV2reBIilhA4yG4GJUeddRvEx5oXYEFSpyN7_eEfKp2EuH7PakEFuPnv9MTUWMd9dxuW7Knn9FGHFs-2X-DMM-GFfF2QCMl0KnOjyMKVaT7beSrFt_xTPeG2bIE0w/s320/linkage.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;">這邊是後級放大以及電源整流濾波,前後級兩塊間用隔離線做吊橋連接兩岸。</div><p><br /></p><p>電容我從唱放部分先換,訊號部分就從原來的電解電容改成小型化金屬膜,電源電容當然就用像樣的電容不一一說明。換好之後,單獨上電測試唱放,發現它仍然是雜訊而沒有訊號,此時再用電表及測試器檢查,發現有一個聲道的Nec製 2SC900 NPN BJT有問題,拆下來再量,還是故障,而且很奇怪,它用的跟線路圖與手冊上的型號不一樣,但是看PCB又沒有明顯維修過的痕跡,猜想是批號不同的機器用了不一樣的代用晶體。總之它壞了,還好對照電晶體替換表,可以用最常見的2SC1815替代,就兩聲道同時一起換掉,再上電測試,透過反RIAA網路後小訊號漂亮正常輸出。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAOesYNT8VTF3a0Rb4uuMonn9R7zn8O9QZm7DIEcNGj9KpiO2l6u-koZW6VJbwxwDhX1mmWGvPM4zNsUaBa17WZc6OUcWmoiYCUpDu3ORii5o7kwLle7nG_B7huSN1E5p42nxlZCZ7YXQOHku7dddAW2_wpSEFrGK_ZvW_pj5HsQOQ7MQY_NhVCQ2Dkw/s2000/phono-recap.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAOesYNT8VTF3a0Rb4uuMonn9R7zn8O9QZm7DIEcNGj9KpiO2l6u-koZW6VJbwxwDhX1mmWGvPM4zNsUaBa17WZc6OUcWmoiYCUpDu3ORii5o7kwLle7nG_B7huSN1E5p42nxlZCZ7YXQOHku7dddAW2_wpSEFrGK_ZvW_pj5HsQOQ7MQY_NhVCQ2Dkw/s320/phono-recap.jpg" width="240" /></a></div><p style="text-align: center;">EPCOS/RIFA金屬膜,Panasonic FM,Rubycon</p><p><br /></p><p>再繼續往前級走,換好電容後,上電,用示波器檢查輸出看起來沒問題。但是後級有從吊橋回授到這一級,所以我就繼續往後級去。板子拆開,先大致量一下輸出功率晶體,看起來沒有短路,就決定先換電容再說。信號交連一樣用小型金屬膜,對地回授用日本音頻ASF電容,電源濾波使用Panasonic FM並略略提高了電容值。整理後把板子裝回去焊好,用自耦變壓器跟dimbulb上電,慢慢提高電壓,發現燈泡會微微地偶爾閃動,而且兩個聲道都同時有雜訊的干擾,輸出直流也會飆高。在此先休息一下,喝口什麼的請自便,再回頭仔細看一下前級與後級兩塊板子,發現前級的兩個NPN晶體,是跟唱放那兩個同一型號的,莫非他們用久了就是會漏電?因為一個聲道才一個晶體很好處理,就再換上hfe相近的2SC1815,再次上電,燈燈燈問題沒了,輸出訊號很漂亮,而且直流也不高約莫10~20mV。接上砲灰喇叭,聲音正常,觀察一陣子沒甚麼問題,算是解決了,回收廠又少了一個可能被送去的好聲老機。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEuC1IFKEh4RC_b-AKoW-d41lF73xzNuy63pxcqBmtqwLM1M2GT--My-qanX0DN43AkrMAnMtB-3sAuQojvnwKVEZFOhKhyk__p9x_FOxy0wlCy0CtuG_8SPJ23RYQSZCgP37wpU3P1EX9jupNFuYSl_gEiDrtq2GcQLvUxMLU-dcVX2iOJe8Eurd8hA/s2000/amp-original.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEuC1IFKEh4RC_b-AKoW-d41lF73xzNuy63pxcqBmtqwLM1M2GT--My-qanX0DN43AkrMAnMtB-3sAuQojvnwKVEZFOhKhyk__p9x_FOxy0wlCy0CtuG_8SPJ23RYQSZCgP37wpU3P1EX9jupNFuYSl_gEiDrtq2GcQLvUxMLU-dcVX2iOJe8Eurd8hA/s320/amp-original.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5zPN5qWGoDo3EURHSzOHKyWeQhir4kvhwBfna44lSN4xndTi5BZD7_cBZWB859Hii7F0w4fmNxj6LPsSUylBQHNqqwQ2GvbiYS7-LGSIRv49YZsmmeJDmhb_M5cne1NYtP3FzrfA51Ad82EV4fjIM45tSOfdJvsO3eh857PfOHoMBa7LFPQy0bFkGRQ/s2000/amp-original-2.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5zPN5qWGoDo3EURHSzOHKyWeQhir4kvhwBfna44lSN4xndTi5BZD7_cBZWB859Hii7F0w4fmNxj6LPsSUylBQHNqqwQ2GvbiYS7-LGSIRv49YZsmmeJDmhb_M5cne1NYtP3FzrfA51Ad82EV4fjIM45tSOfdJvsO3eh857PfOHoMBa7LFPQy0bFkGRQ/s320/amp-original-2.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;">原機的電容。很多上面的標示都是72年的。</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZQabYpCtHdGwt7-nk_dk2nAxRt0STLcEBkhZGQpFKXUua5-PTXuLuVE24uaQTLW19kUxzNJM8hKsAF6ba7GuwdWLVu9bwG2HOylJ-HDLezoickmEqF85m5gTmOq7l6dLedPAUAhf_QZrENT1aH3gZQLU588uKjEMETr2egGKIAmsTAUwvwPF14cdWXQ/s2000/amp-recap.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1798" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZQabYpCtHdGwt7-nk_dk2nAxRt0STLcEBkhZGQpFKXUua5-PTXuLuVE24uaQTLW19kUxzNJM8hKsAF6ba7GuwdWLVu9bwG2HOylJ-HDLezoickmEqF85m5gTmOq7l6dLedPAUAhf_QZrENT1aH3gZQLU588uKjEMETr2egGKIAmsTAUwvwPF14cdWXQ/s320/amp-recap.jpg" width="288" /></a></div><br /><div class="separator" style="clear: both; text-align: center;">換上新的電容器</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhrRgMZxiiDSOJKwbxcIkb6p2vdL3kUJjzMB8tpK9vCG61JRRgfnfOlIyEaCd9urfnofnmhyifyCdpRkon_og9ci0roTQAvFl1-H3jv7w2n_fnQVyoFjbfWXKd1czd8H5M79cyOq5JB2uvc20jij9710jAktxrxEc3TZ1MnBOm9a0bcQq891iANEO3_CQ/s2000/retired.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhrRgMZxiiDSOJKwbxcIkb6p2vdL3kUJjzMB8tpK9vCG61JRRgfnfOlIyEaCd9urfnofnmhyifyCdpRkon_og9ci0roTQAvFl1-H3jv7w2n_fnQVyoFjbfWXKd1czd8H5M79cyOq5JB2uvc20jij9710jAktxrxEc3TZ1MnBOm9a0bcQq891iANEO3_CQ/s320/retired.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;">退休了的電容跟晶體</div><div><br /></div><div><br /></div><p>拿到客廳的系統上,一開聲,那種充滿音樂感的聲音隨即洋溢著,唱放部分也是非常好聽,推現代的落地喇叭也不會覺得有什麼不足之處,正像網路評論說,聽這部機器不會去關心甚麼音場啊下潛啊解析度啊,那些是給發燒友去追求的。這部機器開起來就是聽音樂,音樂本身想告訴你的,TA-88都能好好地傳達給你,這樣,我覺得就很夠而不可多得了。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglRNxJHAqjv8sjc32593sGjbD8AahNiqCMPFAiQxpmKV6ykfKntIGM2n0zg2pSWytAQ0n4oBwxsI1N_rYiCE-SB8AE78EODzLEf9y19noHiLr0PzWZv7CRC7PJlhfONQTrCVfq9fnNaeenbdGa37moXPrXUsYPZctsdgPFgSXM16MrFCrWu2-_II9I-Q/s2000/TA-88-45.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1813" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglRNxJHAqjv8sjc32593sGjbD8AahNiqCMPFAiQxpmKV6ykfKntIGM2n0zg2pSWytAQ0n4oBwxsI1N_rYiCE-SB8AE78EODzLEf9y19noHiLr0PzWZv7CRC7PJlhfONQTrCVfq9fnNaeenbdGa37moXPrXUsYPZctsdgPFgSXM16MrFCrWu2-_II9I-Q/s320/TA-88-45.jpg" width="290" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQ7ILmJJ40Sut-bAlrrCFROvqcuBr3QQN9IVa_JUgYkYy2dv5u7-QW2oBEDfK1Fpw0BgXzX_Gb-ABdrKcxs5C3VzkN1gz1a0D_kMrDxBkd7-SHW6L4S2DqAa6iKUfrEZMq4VXZdZF_js4elzM4nj7GRQXWjsaFOaZcTQccPKu3xuVM-DixUxp3kiHVpQ/s2000/TA-88-front.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1547" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQ7ILmJJ40Sut-bAlrrCFROvqcuBr3QQN9IVa_JUgYkYy2dv5u7-QW2oBEDfK1Fpw0BgXzX_Gb-ABdrKcxs5C3VzkN1gz1a0D_kMrDxBkd7-SHW6L4S2DqAa6iKUfrEZMq4VXZdZF_js4elzM4nj7GRQXWjsaFOaZcTQccPKu3xuVM-DixUxp3kiHVpQ/s320/TA-88-front.jpg" width="248" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnM1gxlIi8o_v6wzLdk8uS7T8louGWrZbvV2lsXIwvG5tjLMPSWBABcaqLo3reKm8sh__EtZd4cn5CIlb9eFk9w6tkHKAe8MkLByS7PpxTafmDhLIXjbKxydMtbJ3YxURvZQ1ETPXIBcmCbZHZF44GhloQ0utSrGEbdo1EnKvCmOc0vyxpEj4aHIs4dQ/s2000/TA-88-top45.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1402" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnM1gxlIi8o_v6wzLdk8uS7T8louGWrZbvV2lsXIwvG5tjLMPSWBABcaqLo3reKm8sh__EtZd4cn5CIlb9eFk9w6tkHKAe8MkLByS7PpxTafmDhLIXjbKxydMtbJ3YxURvZQ1ETPXIBcmCbZHZF44GhloQ0utSrGEbdo1EnKvCmOc0vyxpEj4aHIs4dQ/s320/TA-88-top45.jpg" width="224" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEXCu6ch_8PfPTFPRbfFEKKotjqv-rGJ14vbiHqp8s6bDDqA04odRbhokY7rwsHmRYSDCgyl6ePvm5-CLyyvl31suC716-7rAkdMpzpYl21EafeMwmb81Y7u5BVhGGUPaIcf_h681gTwaCDS3AdO2c-HHnKC6K05WfOnOyvbGeWCbRDt8RM0hcufxDCw/s2000/TA-88-back.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1798" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEXCu6ch_8PfPTFPRbfFEKKotjqv-rGJ14vbiHqp8s6bDDqA04odRbhokY7rwsHmRYSDCgyl6ePvm5-CLyyvl31suC716-7rAkdMpzpYl21EafeMwmb81Y7u5BVhGGUPaIcf_h681gTwaCDS3AdO2c-HHnKC6K05WfOnOyvbGeWCbRDt8RM0hcufxDCw/s320/TA-88-back.jpg" width="288" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><p>而且貓咪也可以喔。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhjltRiAkm6HDZN8SywAX-tbP4Y73DXLy5xawAmMca46ImIAYAGT6w3coBItt-CdR-LsY04YhCnziPvnZ6_0QzeEGwe01yExGwqNq7HzVi0T4vmNca8O5gFlnofToGVfK1c8HGQc3WlldlmL5bf6KaeOO7ingFN2emy8BxzURdPXnSTPdfKJlnfb7vyJQ/s2000/tan-ji.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhjltRiAkm6HDZN8SywAX-tbP4Y73DXLy5xawAmMca46ImIAYAGT6w3coBItt-CdR-LsY04YhCnziPvnZ6_0QzeEGwe01yExGwqNq7HzVi0T4vmNca8O5gFlnofToGVfK1c8HGQc3WlldlmL5bf6KaeOO7ingFN2emy8BxzURdPXnSTPdfKJlnfb7vyJQ/s320/tan-ji.jpg" width="240" /></a></div><br /><p><br /></p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com3tag:blogger.com,1999:blog-8728071242293079417.post-90743659641174984192022-06-19T16:41:00.006+08:002022-06-21T17:22:29.436+08:00Unison Research Simply Two<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://audio-heritage.jp/UNISONRESEARCH/amp/simplytwo.html" style="margin-left: 1em; margin-right: 1em;" target="_blank"><img border="0" data-original-height="600" data-original-width="568" height="600" src="https://audio-heritage.jp/UNISONRESEARCH/amp/simplytwo(1).jpg" width="568" /></a></div><br /> <p></p><p><br /></p><p>在剛開始迷音響的彼時,大部分的機器都要不是黑漆漆的方塊,要不就是長得像某種儀器或是發電廠的形狀,聲音可能不錯但是視覺上總覺得很單調或是過於硬派。直到某一天,在雜誌上看到了一張迷人的照片,像是藝術品也像是高級家具,才發現原來音響器材也可以設計得那麼優雅美麗。它就是義大利的音響品牌,Unison Research。</p><p><br /></p><p>節錄自<a href="https://www.pinyoaudio.com.tw/product-category/unison-research/">品樂音響</a>:Unison Research成立於1987年,由Giovanni Maria Sacchetti創立。Giovanni Maria Sacchetti出生於1945年,從小就致力於高傳真音響系統的研究和設計,結合他對電子學的興趣和父親(一位專業鋼琴家)傳承音樂的熱情。完成電子學的學業後,並致力於教學二十五年,同時為 Unison Research 設計和開發擴大機。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://upload.review33.com/avforum/201706/201706120912414200.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="308" data-original-width="640" height="265" src="https://upload.review33.com/avforum/201706/201706120912414200.jpg" width="551" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">Absolute 845</div><br /><p><br /></p><p>當時看到最厲害的機型,當然是Unison Absolute 845,四根845大功率管,搭配弧形原木與銅色金屬,真的不得不佩服義大利人對於造型與材料的美感與天賦。當然這是他們天價的旗艦機,不過他們也沒有忘了一般的客層,以同樣堅持的態度,設計出了一款小單端綜合機,Simply Two。</p><p><br /></p><p>Simply Two是以EL34作為輸出管,ECC82推動,額定輸出12W,附有兩段負回授切換開關調整回授量,輸出有4/8歐姆兩組。四組輸入,Tape輸入輸出與監聽,背後還有一個電源供應給自家的Simply Phono唱頭放大使用。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://audio-heritage.jp/UNISONRESEARCH/amp/simplytwo(2).jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="350" data-original-width="500" height="350" src="https://audio-heritage.jp/UNISONRESEARCH/amp/simplytwo(2).jpg" width="500" /></a></div><br /><p><br /></p><p>_____________________________________________________________</p><p><br /></p><p>友人委託我檢查這部機器,他說有一個聲道沒了聲音,後來就閒置著。搬上測試台,先接個砲灰喇叭,不插管子,緩緩升壓上去,並沒有明顯的過電流或是異味,於是插上管子再重新測試,兩邊的燈絲都亮,但是一邊的確沒有聲音。下電放電後,確定最昂貴的輸出變壓器,兩聲道初級跟次級的阻抗都一致,才比較放心繼續研究下去。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNhmNWmQLVmb2eVmS6vnfEyGTknc5dSBvkGmMPVSexg5A5bwvUY569XiLKyFA4y1rN4cdUhrORCvxjL1oFCEEaZlP8_G6A1lNFrEuTr5OmSLTHfFSlNgYmavXdU90Cc1v1Ogna51K0Emcw-QfN6121QpYVMsz-NuQ5sznq_MWYWlP4sC2ClXF5MdEd-A/s4032/IMG_8583.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNhmNWmQLVmb2eVmS6vnfEyGTknc5dSBvkGmMPVSexg5A5bwvUY569XiLKyFA4y1rN4cdUhrORCvxjL1oFCEEaZlP8_G6A1lNFrEuTr5OmSLTHfFSlNgYmavXdU90Cc1v1Ogna51K0Emcw-QfN6121QpYVMsz-NuQ5sznq_MWYWlP4sC2ClXF5MdEd-A/s320/IMG_8583.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEje7H-whKNySSRtnwmv_MwQTK_QWprtj4qnwF8BaDrTuGGgk8BanNXReU3OOzwiEeaAoa9th1Y7d-OwLafb64HSIW52PZB8jdpOKPfI1qxbXjMH2M_ec18PESdrxTB-oybYziXOlZFlUM5O5RdDTi6F8himu5JPHFEYLPmjNGbFrhMSvaOECocqBTwNpw/s4032/IMG_8585.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEje7H-whKNySSRtnwmv_MwQTK_QWprtj4qnwF8BaDrTuGGgk8BanNXReU3OOzwiEeaAoa9th1Y7d-OwLafb64HSIW52PZB8jdpOKPfI1qxbXjMH2M_ec18PESdrxTB-oybYziXOlZFlUM5O5RdDTi6F8himu5JPHFEYLPmjNGbFrhMSvaOECocqBTwNpw/s320/IMG_8585.jpg" width="320" /></a></div><p><br /></p><p>看到內部基板,最明顯的,就是那兩顆已經開花的電解電容,他們是負責EL34陰極自偏壓的。再仔細看,有一個聲道的陰極電阻也疑似有燒焦的痕跡。此時福至心靈地,去檢查輸入端是否有訊號進去基板,才發現有一個聲道在經過VR之後就不導通了,看來電路方面要處理的問題不少。另外拆底板其實費了我不少功夫,底板螺絲都鏽光光了,而且原機的腳墊是用黏上去的,早已因為拖拖拉拉而掉落,這個也要弄好。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4WFVucE3w_N_j-rWo7n60YNYyAjln8J9tsGC20sNGhdEccV__iqZwTAxGLN0EqqRo76hqDEcK-RcQ7XAhv8dP6BEErtTUrvAH8pwn5gVkOjz2XmWG3r9wW6PWiQjhuQvhNbiAoDvP45YRPIfu-oaa0TtLNrCBOKWbfteKxW83TaZiZkHCQLbrTUl0dQ/s4032/IMG_8586.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4WFVucE3w_N_j-rWo7n60YNYyAjln8J9tsGC20sNGhdEccV__iqZwTAxGLN0EqqRo76hqDEcK-RcQ7XAhv8dP6BEErtTUrvAH8pwn5gVkOjz2XmWG3r9wW6PWiQjhuQvhNbiAoDvP45YRPIfu-oaa0TtLNrCBOKWbfteKxW83TaZiZkHCQLbrTUl0dQ/s320/IMG_8586.jpg" width="240" /></a></div><br /><p><br /></p><p>首先把VR基板拆下,確認其中一個聲道的確有問題,只好拆下VR。本想直接換一個新的,無奈找不到一模一樣的零件,於是檢視VR,發現沒有導通的一邊好像有點歪,就把VR拆開,調整接觸彈片並且清潔,裝回去再測量就OKOK的。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaat1hp8uWYDMBahxFCk65P5afh0BurPAtHf_Mcsxm_h076hPQ-FxUx0llQ9Dj8__RZ6qtpsYVPle6OYpLAXF-mRFlc0Q0w6IgiAEXgvUapcRRwgKWS6Dmfp4sRGLorm4iM-SZ1wpWIMOyMPdcaglO_NPnciNQQ9m7DSzY_tTH3Zq3wAUPezAWn4l80Q/s4032/IMG_8587.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaat1hp8uWYDMBahxFCk65P5afh0BurPAtHf_Mcsxm_h076hPQ-FxUx0llQ9Dj8__RZ6qtpsYVPle6OYpLAXF-mRFlc0Q0w6IgiAEXgvUapcRRwgKWS6Dmfp4sRGLorm4iM-SZ1wpWIMOyMPdcaglO_NPnciNQQ9m7DSzY_tTH3Zq3wAUPezAWn4l80Q/s320/IMG_8587.jpg" width="320" /></a></div><br /><p><br /></p><p>再來就是把基板拆下,換上兩顆105度規格的電容;測量陰極電阻,有燒毀痕跡的那顆已經斷路,另外一顆看不到阻值但量出來是180R,就翻出手邊的Draloric 4W 470R來並聯成235R,裝好之後再測試,很好,兩邊都有正常的聲音了。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjIKN6Q-bfAgrJESjrZONgK8a3WBRySxxqe5YDKikakpICgnSglvPOK1aLMoltMKtSua1reaBPwIywzc1RC02tTNtZd_MWOUG2G_cHJBBzbUhW8LTDGURnSQtpJlfcSTluGnpV3CUsSYIHR4J0WjRcLb5RJsh2Z03I-iDeMRlB1PWUvWerR7EyNeslf5g/s4032/IMG_8610.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjIKN6Q-bfAgrJESjrZONgK8a3WBRySxxqe5YDKikakpICgnSglvPOK1aLMoltMKtSua1reaBPwIywzc1RC02tTNtZd_MWOUG2G_cHJBBzbUhW8LTDGURnSQtpJlfcSTluGnpV3CUsSYIHR4J0WjRcLb5RJsh2Z03I-iDeMRlB1PWUvWerR7EyNeslf5g/s320/IMG_8610.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZ0YYFZUKI8F76RJzwtDIXpkkIlt8jZ03zXOHU3FSkWY8IdinEL-xnudN4xYSDj03JpUZ-26iWNwBsqvYry8PBr8TJ8BggctjlEcT16C6QG-OavwXuPdiMiw-0sPNzfCz7wV4KlWpuC4w2y-XlhH35ns8DUCoyAqbXYqD_c6bKCSkBpuvFZV7LPeyLwA/s4032/IMG_8601.jpg" style="margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZ0YYFZUKI8F76RJzwtDIXpkkIlt8jZ03zXOHU3FSkWY8IdinEL-xnudN4xYSDj03JpUZ-26iWNwBsqvYry8PBr8TJ8BggctjlEcT16C6QG-OavwXuPdiMiw-0sPNzfCz7wV4KlWpuC4w2y-XlhH35ns8DUCoyAqbXYqD_c6bKCSkBpuvFZV7LPeyLwA/s320/IMG_8601.jpg" width="320" /></a></div><p></p><p>最後把底板鑽孔,鎖上腳墊,換上全新的螺絲,一部名機又再次生龍活虎了。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPb0cPAH04acWBYN4qfc1qm0n5RRXoQNNd9vTXztg8LPztBDwE8Nr0KwDpFFMEQxBHkQNzI9SbrZWDV8c8fPes3DheHqEDIyO03xTbHeTAG0v7X20wX8V0g1jntvsYiukcWHofWYBxb0rD82MLNKtDetgT8i75dxgTwZAzzQuoXVlBO2Sa9sO5NS6UFw/s2000/DSC_0193.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1325" data-original-width="2000" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPb0cPAH04acWBYN4qfc1qm0n5RRXoQNNd9vTXztg8LPztBDwE8Nr0KwDpFFMEQxBHkQNzI9SbrZWDV8c8fPes3DheHqEDIyO03xTbHeTAG0v7X20wX8V0g1jntvsYiukcWHofWYBxb0rD82MLNKtDetgT8i75dxgTwZAzzQuoXVlBO2Sa9sO5NS6UFw/s320/DSC_0193.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhyuRef8CFmJr_6f9KoTfECUV9Q_KZtzZgoWfwRXcQHKT8mEoS6AoJlmD2p8iWzy0BXELtEP0BePK-ZelK8A4veA0EABxdUpsgxDdjElByXnps4nyt-E-C9bZXcKdUsP4H6DRbtFMD7JDMxcrfp30bhAy9v_JH9gQabVZxB-ozxUNvQvFl-7fJLT7JY5Q/s2000/DSC_0194.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1325" data-original-width="2000" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhyuRef8CFmJr_6f9KoTfECUV9Q_KZtzZgoWfwRXcQHKT8mEoS6AoJlmD2p8iWzy0BXELtEP0BePK-ZelK8A4veA0EABxdUpsgxDdjElByXnps4nyt-E-C9bZXcKdUsP4H6DRbtFMD7JDMxcrfp30bhAy9v_JH9gQabVZxB-ozxUNvQvFl-7fJLT7JY5Q/s320/DSC_0194.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRZu284yNmZzLudzSsLPMoB9uaPP43S1VdUO7amL-ouBRLZFywVWzrVAzIsAarDngW3562mil0dCuO0L5R-RXy9U2k_HiDFgUjKRZCBhNh_DP0NspKTo8v7vScBGs4ITyHCtSkrc1U3e3qoaGY3xweo3ltf2jmwdKea0zVJSmUqNJGcJDxx57gBGIgRQ/s2000/DSC_0195.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1657" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRZu284yNmZzLudzSsLPMoB9uaPP43S1VdUO7amL-ouBRLZFywVWzrVAzIsAarDngW3562mil0dCuO0L5R-RXy9U2k_HiDFgUjKRZCBhNh_DP0NspKTo8v7vScBGs4ITyHCtSkrc1U3e3qoaGY3xweo3ltf2jmwdKea0zVJSmUqNJGcJDxx57gBGIgRQ/s320/DSC_0195.jpg" width="265" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgC732--zphEmmZqY4n8XhZraKh6-s73-AHMwN-aqza-88SDgyjUStljCrqKlv8z1v4gzIKDzMfHRaxcbYEwnDdfmU54G481xJtkFOAaA_OQyxfJCJnVgoi9jph8fvyENGz1AdMnkce-NquqlXB06auOydLDfaWYd3wgdRskh_WLKkBCpsImYCWjo01YQ/s2000/DSC_0196.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1325" data-original-width="2000" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgC732--zphEmmZqY4n8XhZraKh6-s73-AHMwN-aqza-88SDgyjUStljCrqKlv8z1v4gzIKDzMfHRaxcbYEwnDdfmU54G481xJtkFOAaA_OQyxfJCJnVgoi9jph8fvyENGz1AdMnkce-NquqlXB06auOydLDfaWYd3wgdRskh_WLKkBCpsImYCWjo01YQ/s320/DSC_0196.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipNYC5PqrMEqBexTetXoguJPLde5nRjwJ1W2P9cQJ4a5X8bowsnKZ7oD-A66oF6xr7H8bTrlV4ytpIvq2lWphh85fGmzlQcpu3Jz6A1GZwjmbdkhPWC0Q3rcphnnmZIQ0kjRwznPxXhyQEwY7dmtH8RMKOkLGhu5CI2IltWNFsgErIUCw85Bw0MHoojw/s2000/DSC_0197.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1325" data-original-width="2000" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipNYC5PqrMEqBexTetXoguJPLde5nRjwJ1W2P9cQJ4a5X8bowsnKZ7oD-A66oF6xr7H8bTrlV4ytpIvq2lWphh85fGmzlQcpu3Jz6A1GZwjmbdkhPWC0Q3rcphnnmZIQ0kjRwznPxXhyQEwY7dmtH8RMKOkLGhu5CI2IltWNFsgErIUCw85Bw0MHoojw/s320/DSC_0197.jpg" width="320" /></a></div><br /><p><br /></p><p>剛好我手邊有舊的Telefunken EL34管子,還有Brimar的13D5,用義大利機器配上德國功率管跟英國訊號管,滿滿的歐洲之聲~~</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGP_tS6kEEg3xRip-g-ihLcmUYAoiaUFyPmJyCIxN_Wb7NhPqY2QWlR4-RFiYjvdquWI8sFCVc1TrnRZ8ciCRZSBe3jCEPqNat_AjeslTFMk43aCSMNaeF128XrC-L74ZaTYvzUQhuH1-Fi-IKgC8rTwg03rjXRs-gFBdHW-dqfil_MWkE6gfi49NP0g/s3542/IMG_E8602.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2469" data-original-width="3542" height="223" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGP_tS6kEEg3xRip-g-ihLcmUYAoiaUFyPmJyCIxN_Wb7NhPqY2QWlR4-RFiYjvdquWI8sFCVc1TrnRZ8ciCRZSBe3jCEPqNat_AjeslTFMk43aCSMNaeF128XrC-L74ZaTYvzUQhuH1-Fi-IKgC8rTwg03rjXRs-gFBdHW-dqfil_MWkE6gfi49NP0g/s320/IMG_E8602.jpg" width="320" /></a></div><br /><div>這時候如果有一對<a href="https://6moons.com/audioreviews/sonusfaber/1.html" target="_blank">Sonus Faber</a>的喇叭,豈不是天作之合?? (許願)</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://6moons.com/audioreviews/sonusfaber/1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="531" data-original-width="698" height="344" src="https://6moons.com/audioreviews/sonusfaber/1.jpg" width="453" /></a></div><div class="separator" style="clear: both; text-align: center;">Minima Amator</div><br /><div><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><br />DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-15561047620028589522022-04-21T13:56:00.006+08:002022-05-16T21:14:37.016+08:00 EAR Yoshino 834P 唱頭放大器 & WTF<p> EAR Yoshino 834P 唱頭放大器</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-YypR-83k0ZAkO-FcL16T-4YOYSWjKbFswAxTGaAeuD1osP7nZBR47MneK54z_61hdhFTWvOH2vFZK_rohtlTat-weW7qn0gPEXUJDb1EUb6Z08i_4EgkHM4JvA5t3SPQBYK1a-3SETm8bNOWUQSSo5JQecG4yDRF1SJ41q92jXebbBZUtOn9R-MztQ/s506/Original_45.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="428" data-original-width="506" height="271" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-YypR-83k0ZAkO-FcL16T-4YOYSWjKbFswAxTGaAeuD1osP7nZBR47MneK54z_61hdhFTWvOH2vFZK_rohtlTat-weW7qn0gPEXUJDb1EUb6Z08i_4EgkHM4JvA5t3SPQBYK1a-3SETm8bNOWUQSSo5JQecG4yDRF1SJ41q92jXebbBZUtOn9R-MztQ/s320/Original_45.jpg" width="320" /></a></div><br /><p><br /></p><p>Esoteric Audio Research簡稱EAR,由一位傳奇設計師Tim de Paravicini在1978年創立,他對音樂以及器材獨特的視野,造就了他不按牌理出牌,跳脫常規設計,以音樂本質為訴求的設計風格,以EAR這個個人品牌,鍛造出許多膾炙人口的真空管擴大機,包括後級,前級,還有唱頭放大。Tim早期就曾幫助Island唱片的刻片師,改善刻片頭的機器失真,他對於黑膠唱片的重播,當然也有他自己非常獨到的看法,這就反映在他所推出真空管唱頭放大-EAR834P上。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh1ZyZ2ijR1flbyvcy_XX8XnATUI3gsoBpSzU1mfYfiAdOpHRK_XlFKoLXZnEPAN0KCEYVARMJkCK7YNBq-EaKnfjPdbwriCkh15ezE81Ezpwlt9d0eM-KdG-UQoZcIPfCMp_xP8ICVqoXnFnMwQQyDgF3dgoODSR0GyVNc8SwGGk256lgk7PNEUS4S_Q/s559/Original_front.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="522" data-original-width="559" height="299" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh1ZyZ2ijR1flbyvcy_XX8XnATUI3gsoBpSzU1mfYfiAdOpHRK_XlFKoLXZnEPAN0KCEYVARMJkCK7YNBq-EaKnfjPdbwriCkh15ezE81Ezpwlt9d0eM-KdG-UQoZcIPfCMp_xP8ICVqoXnFnMwQQyDgF3dgoODSR0GyVNc8SwGGk256lgk7PNEUS4S_Q/s320/Original_front.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirbXidoUgwVXIxUuUTSnAdqez7QKWU4MTyDkVj-mmnkYf0AsnwcrABobgT438PTFMwgjGKLlOLkbsLIZU28_Ub3bAV_SRqa5DwBLPHP1WvV7squmMeqCjTlcO9y-OztBph0DAkQk6h3LgvoE60kqcomX-iyqO4Dqqa5XEb1FO39E3Lu9cV3tcUHGuXfA/s510/Original_back.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="475" data-original-width="510" height="298" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirbXidoUgwVXIxUuUTSnAdqez7QKWU4MTyDkVj-mmnkYf0AsnwcrABobgT438PTFMwgjGKLlOLkbsLIZU28_Ub3bAV_SRqa5DwBLPHP1WvV7squmMeqCjTlcO9y-OztBph0DAkQk6h3LgvoE60kqcomX-iyqO4Dqqa5XEb1FO39E3Lu9cV3tcUHGuXfA/s320/Original_back.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBN8EAZAgtpBUOaNaVDCQw4cOWjOzoZ5uAwJHs5UcpM612iYFOzXrVVEgelq6a-v3hlTtyqmQKnUYNHBYwXstVL9y1ALyufGFj4ukVODG-0EhFjDFVW7qy1KTGYRBmkM1TB027FeeX2r7UpOCsH7GcDxhq7MuNCL3HxjHmKmAj_AvnLy19wlqosXN0lw/s560/Original_inside.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="374" data-original-width="560" height="214" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBN8EAZAgtpBUOaNaVDCQw4cOWjOzoZ5uAwJHs5UcpM612iYFOzXrVVEgelq6a-v3hlTtyqmQKnUYNHBYwXstVL9y1ALyufGFj4ukVODG-0EhFjDFVW7qy1KTGYRBmkM1TB027FeeX2r7UpOCsH7GcDxhq7MuNCL3HxjHmKmAj_AvnLy19wlqosXN0lw/s320/Original_inside.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: justify;"><span style="text-align: left;">EAR834P採用3支12AX7/ECC83真空管作為放大元件,等化線路採負回授方式,不同版本還提供了MC升壓器以及輸出音量調整的選項。在小巧而狹長的機身中,金屬隔板把內部分為放大部與電源部,環形變壓器安置在金屬隔板上,小型化的MC升壓器裝在靠近輸入端子,這麼緊湊的設計卻沒有可聞的哼聲;重要的是,他的聲音非常好,典雅光輝,華麗卻不咄咄逼人,馬上就沉浸在唱片的旋律之中享受音樂的美好,難怪推出之後就獲得全世界音響圈一致好評,成為唱頭放大的經典器材之一。</span></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjo3zo72dVA3Aff06ZMBhaU-MaKXPAgczVGmgzBUG_TnXC9VCl1siRFJRo7AkuTm3hlxz_x4zxGBM6POmK60ysyH5YThtNYcrNg5mXLOQg0iHeisHrDtow4e5LYXptaaJm4Mo07F3qoOep9Iv_SyzTOxi9M1hmyyMiaHID0U9wQM6Zat2iQb6FJNFXR5Q/s2786/EAR834P.gif" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1830" data-original-width="2786" height="210" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjo3zo72dVA3Aff06ZMBhaU-MaKXPAgczVGmgzBUG_TnXC9VCl1siRFJRo7AkuTm3hlxz_x4zxGBM6POmK60ysyH5YThtNYcrNg5mXLOQg0iHeisHrDtow4e5LYXptaaJm4Mo07F3qoOep9Iv_SyzTOxi9M1hmyyMiaHID0U9wQM6Zat2iQb6FJNFXR5Q/s320/EAR834P.gif" width="320" /></a></div><p><br /></p><p>規格:</p><p><br /></p><p>最大輸出 / 30V</p><p>雜音 / -80dB (1HF)</p><p>使用真空管 / ECC83 X 3</p><p>MM輸入靈敏度 / 2.2mV for 1V @ 1kHz (53dB)</p><p>MC輸入靈敏度 / 0.22mV for 1V @ 1kHz (73dB)</p><p><br /></p><p>型號:</p><p><br /></p><p>EAR 834P MM : 僅供MM唱頭使用</p><p>EAR 834P Signature : MM/MC唱頭兩用,並可選加裝輸出音量旋鈕</p><p>EAR 834P Deluxe :Signature版的精選版,外觀加上鍍鉻與金色裝飾</p><p><br /></p><p>__________________________________________________________________</p><p><br /></p><p>(以上為分隔線)</p><p>(以下與EAR834P 廠機無關)</p><p><br /></p><p><br /></p><p>因為有興趣,聽過它的聲音覺得好,因為小巧,所以就去找了找,發現eBay上有個Douk的套件可買,買了。</p><p><br /></p><p>以下就把安裝過程描述一下。</p><p>首先收到的套件是長這樣:PCB成品,面板,機箱上蓋,機箱底板,中間隔板,環形變壓器與固定板,電源開關,旋鈕,輸出入端子與子板(未焊接),電源插座,保險絲盒與螺絲/零件等。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0vItYdzSYEOPai4M-M_oPs38FueJc11Z0dTDmQ5xD5yWNDUzzmEVgqAl1dZXAxzycRD9BqS6w8HmeLsxMCy3BOvTgNIomjL3JEhdW7M7OG11QYKac6bio6IVYJwPnuK3xrq0Oypzqglo4MrA12--DSEaJUJhmd8R2fpPK9BBrymipDj1e_TSsHzA_2w/s2000/%E5%A5%97%E4%BB%B6%E5%85%A7%E5%AE%B9.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1645" data-original-width="2000" height="263" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0vItYdzSYEOPai4M-M_oPs38FueJc11Z0dTDmQ5xD5yWNDUzzmEVgqAl1dZXAxzycRD9BqS6w8HmeLsxMCy3BOvTgNIomjL3JEhdW7M7OG11QYKac6bio6IVYJwPnuK3xrq0Oypzqglo4MrA12--DSEaJUJhmd8R2fpPK9BBrymipDj1e_TSsHzA_2w/s320/%E5%A5%97%E4%BB%B6%E5%85%A7%E5%AE%B9.jpg" width="320" /></a></div><br /><p>首先把電源座,保險絲盒,地線接座裝在機箱背板上。把四個RCA座焊在兩個輸出入子板上。</p><p>把兩片子板分別插在主PCB的輸入輸出插pin上,先不要焊接。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJ2aJLIvO8yZNDDcnW7j9Dleoa6jvAhb4OP22L-6oUfP_tOWT2fQ2Ea4mD74K6B1tCRw5nXE1eXNbI3C7-55IjrB3jWWLQY09IoEbb6neo40-ibXSs_DMuxnJWD0WhF0aYBMcBxGcNPJUIIPEH1VCjLImqYQLA0f4tmHYrCFx6zLH_uoTrKj6vYrNfMA/s2000/%E6%8F%92%E4%B8%8A%E8%BC%B8%E5%85%A5%E6%9D%BF.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJ2aJLIvO8yZNDDcnW7j9Dleoa6jvAhb4OP22L-6oUfP_tOWT2fQ2Ea4mD74K6B1tCRw5nXE1eXNbI3C7-55IjrB3jWWLQY09IoEbb6neo40-ibXSs_DMuxnJWD0WhF0aYBMcBxGcNPJUIIPEH1VCjLImqYQLA0f4tmHYrCFx6zLH_uoTrKj6vYrNfMA/s320/%E6%8F%92%E4%B8%8A%E8%BC%B8%E5%85%A5%E6%9D%BF.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZiSuMHlX6XMCRDA67b9A8k4Zmij8hmjLGpjPjPNSk63S7HAvU-0sucDYh3cyoRT3WYfRwhr5UDPYpx-j09d3S7yT0KiUjdRL1OtP__VY0S0bRP_N0qNRt1O58gl1RSRY1VJPZh0YJZ6P12oV1VmozacNPnKbOhbjXH4a2XH5xx2dukvv2yNAda6Jn_A/s2000/%E6%8F%92%E4%B8%8A%E8%BC%B8%E5%87%BA%E5%85%A5%E6%9D%BF.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZiSuMHlX6XMCRDA67b9A8k4Zmij8hmjLGpjPjPNSk63S7HAvU-0sucDYh3cyoRT3WYfRwhr5UDPYpx-j09d3S7yT0KiUjdRL1OtP__VY0S0bRP_N0qNRt1O58gl1RSRY1VJPZh0YJZ6P12oV1VmozacNPnKbOhbjXH4a2XH5xx2dukvv2yNAda6Jn_A/s320/%E6%8F%92%E4%B8%8A%E8%BC%B8%E5%87%BA%E5%85%A5%E6%9D%BF.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>把主PCB放在機箱底板上,將輸出入RCA座插入背板預留的四個圓孔,推到底,然後鎖上RCA座的螺帽。螺帽先鎖手緊,然後將PCB固定座的三個銀色螺絲對好鎖上(位置如下圖紅圈),再將RCA座螺帽旋緊,最後把子板焊好在主PCB上。<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQocAX2R1dlNFONAYFIcO6xdc8qfxPzWrSzMGj4tENtAsqUu9rHoJsnyuvNlGDk1Oay9afHD7ZNu78BxbGfS7By-OhkpQMcjmwliZ6ogGcpM6UyfmDvpt1A12x5gFSXuYwBvDXrNRn0B2F6xtoNPTJ3xXy02_Ds23qCm3iav9_xMkcXwWpZVBi4Zgn5g/s2000/%E8%BC%B8%E5%87%BA%E5%85%A5%E6%9D%BF%E5%AD%90%E6%8E%A8%E9%80%B2.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQocAX2R1dlNFONAYFIcO6xdc8qfxPzWrSzMGj4tENtAsqUu9rHoJsnyuvNlGDk1Oay9afHD7ZNu78BxbGfS7By-OhkpQMcjmwliZ6ogGcpM6UyfmDvpt1A12x5gFSXuYwBvDXrNRn0B2F6xtoNPTJ3xXy02_Ds23qCm3iav9_xMkcXwWpZVBi4Zgn5g/s320/%E8%BC%B8%E5%87%BA%E5%85%A5%E6%9D%BF%E5%AD%90%E6%8E%A8%E9%80%B2.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">把RCA座推進孔位</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNopUpFdqwx7Gt35bOKv4DzHrZhD2lhV8feFGhWsLyQrOo2YRbD-IjssHMrtg5g1n5uqx9k6NtPFqpnRly5pvFd93RCaGBiviTzGwLSBpe93BfBAnsDQbyI6xj1U_Q7uwY5ah00icUEWvtP7_aJ6hmR7VpFBeZQ_JV6Xd2ByFx1pl9iVP4FHKia8wSNA/s2000/%E7%AB%AF%E5%AD%90%E5%B0%8D%E5%A5%BD.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNopUpFdqwx7Gt35bOKv4DzHrZhD2lhV8feFGhWsLyQrOo2YRbD-IjssHMrtg5g1n5uqx9k6NtPFqpnRly5pvFd93RCaGBiviTzGwLSBpe93BfBAnsDQbyI6xj1U_Q7uwY5ah00icUEWvtP7_aJ6hmR7VpFBeZQ_JV6Xd2ByFx1pl9iVP4FHKia8wSNA/s320/%E7%AB%AF%E5%AD%90%E5%B0%8D%E5%A5%BD.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">端子位置對好推緊</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkNWSXQgTM5A-_pSpCpm-_gBuJ5c_x3CB-FNDLp0qO3muOxqwCvbw8Jz8kggPg01mlQvmcvrNb9-rMfTibkJL-cUsaYdToDF51KGqdTSeyeFKOkyv8d3vLOHTFViiqZW8sk3HD4z0LqIRZRf0lKK-IXiJ8jsDzMGkW3onYM5HX5P406_VC_aA_pcdALw/s2000/M3%E8%9E%BA%E7%B5%B2%E4%B8%89%E9%A1%86.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkNWSXQgTM5A-_pSpCpm-_gBuJ5c_x3CB-FNDLp0qO3muOxqwCvbw8Jz8kggPg01mlQvmcvrNb9-rMfTibkJL-cUsaYdToDF51KGqdTSeyeFKOkyv8d3vLOHTFViiqZW8sk3HD4z0LqIRZRf0lKK-IXiJ8jsDzMGkW3onYM5HX5P406_VC_aA_pcdALw/s320/M3%E8%9E%BA%E7%B5%B2%E4%B8%89%E9%A1%86.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">鎖好M3螺絲,如紅圈所示</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgssfP1XnqeJzFiJcHn_hnUko5os1wPe1c5sy7RzBOPiT8Pn3pMmAyZ69DyOkxb_TtKjQKQoCA0wYAlQZFsSRibPh0wGjMByWOuqswFiP4QiaXFTvjRkNqmhQxpGnfP6o_iQNJkX6XUZib1sdinzFbkAq8ZDMfifR50nrDmm1ACA-yxCqY2VN6ifRHR0Q/s2000/%E9%8E%96%E7%B7%8A%E7%AB%AF%E5%AD%90%E8%9E%BA%E5%B8%BD.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgssfP1XnqeJzFiJcHn_hnUko5os1wPe1c5sy7RzBOPiT8Pn3pMmAyZ69DyOkxb_TtKjQKQoCA0wYAlQZFsSRibPh0wGjMByWOuqswFiP4QiaXFTvjRkNqmhQxpGnfP6o_iQNJkX6XUZib1sdinzFbkAq8ZDMfifR50nrDmm1ACA-yxCqY2VN6ifRHR0Q/s320/%E9%8E%96%E7%B7%8A%E7%AB%AF%E5%AD%90%E8%9E%BA%E5%B8%BD.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;">螺帽鎖上</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiqcysDYNkna2WbrtsjlqImG5aQrE1j2LkWXqOVBkz8p3G8ZwizzNavs_f2iNJA1ShZ65tdR2SZeVPJJZO8YIQvgVou9cknGNX9Xjx3IO5ubg-g5y6ynUooQPMjc8ziGapSGeylQOkltffM4aUen5bqT4GlK-Bo8k1XhMqa7RXhYbMFGqQ5IiBZK5Ylg/s2000/%E8%BC%B8%E5%87%BA%E5%85%A5%E6%9D%BF%E7%84%8A%E6%8E%A5.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiqcysDYNkna2WbrtsjlqImG5aQrE1j2LkWXqOVBkz8p3G8ZwizzNavs_f2iNJA1ShZ65tdR2SZeVPJJZO8YIQvgVou9cknGNX9Xjx3IO5ubg-g5y6ynUooQPMjc8ziGapSGeylQOkltffM4aUen5bqT4GlK-Bo8k1XhMqa7RXhYbMFGqQ5IiBZK5Ylg/s320/%E8%BC%B8%E5%87%BA%E5%85%A5%E6%9D%BF%E7%84%8A%E6%8E%A5.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">焊好輸出入板</div><br /><div><br /><p>再來是安裝中間的金屬隔板,先斜斜的找到角度放入機箱的前板背板間,然後打平就可以對正前後板,再來豎直就可以對好固定的螺孔了。然後把三個皿頭螺絲分別鎖在前板,背板與底板。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiG5tg677PnMU_89iFv2sjO0SI7eMoWvQ3tfOJbp5xpLY20kAK4W87dE4fV_zbaZl4huXO-SG3relmEqorzmrIQxjikY_5RoK4OMXNw7PEf5om-_Iig_ROTHmsOlfguImhY-va0sCVXaNZZtQKnyfH6GRyqEqZrHe2Lc2eB7VsL2-QWHMnuj3w3xMks9A/s1200/s-l1600.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="696" data-original-width="1200" height="186" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiG5tg677PnMU_89iFv2sjO0SI7eMoWvQ3tfOJbp5xpLY20kAK4W87dE4fV_zbaZl4huXO-SG3relmEqorzmrIQxjikY_5RoK4OMXNw7PEf5om-_Iig_ROTHmsOlfguImhY-va0sCVXaNZZtQKnyfH6GRyqEqZrHe2Lc2eB7VsL2-QWHMnuj3w3xMks9A/s320/s-l1600.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">裝好的隔板(取自網路圖片)</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJcPt1xSwW5yGoUJZC1nZh9ySs616zXbl2kFnVKgWWVYNel4yr_M2TaxfOAf1lyS2WGEuf9HeX76fiWXZGJ3A-uO57XXJWtFPmPx4K7Hqe8lGuubuU-oL_b5zoFxMzcueIGRVsyynzUQUAkKEGfj6jEJ-1jHJvwaZC0Jjscrh6FdjGY5FOtuClA5ey1A/s2000/%E9%9A%94%E6%9D%BF%E8%9E%BA%E7%B5%B2%E6%AD%A3%E9%9D%A2.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJcPt1xSwW5yGoUJZC1nZh9ySs616zXbl2kFnVKgWWVYNel4yr_M2TaxfOAf1lyS2WGEuf9HeX76fiWXZGJ3A-uO57XXJWtFPmPx4K7Hqe8lGuubuU-oL_b5zoFxMzcueIGRVsyynzUQUAkKEGfj6jEJ-1jHJvwaZC0Jjscrh6FdjGY5FOtuClA5ey1A/s320/%E9%9A%94%E6%9D%BF%E8%9E%BA%E7%B5%B2%E6%AD%A3%E9%9D%A2.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">前板皿頭螺絲位置</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>再來將鋁製面板用四個內六角M4螺絲固定好,再裝上音量開關(已裝好在PCB上)與電源開關。記得先量一下電源開關導通的位置。</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1E7C8dHVbEO8OgLnU_8tmRQGXoQPHCIAKsw5eBDYU7JgR0IY5T0x8scxGVoeMC7pXYz7EGMEbTDjyzlxtXdhq69mgfd9PHA6srPmLfpVUmIRy8wB0tyX7tONWp3iYELS_pXT4-SBCtctWGP2YWbXvBwhzhiBN7JnFsEXoqMT6jPFosw9fihbFPoDIVQ/s2000/%E9%9D%A2%E6%9D%BF%E5%AE%89%E8%A3%9D.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1E7C8dHVbEO8OgLnU_8tmRQGXoQPHCIAKsw5eBDYU7JgR0IY5T0x8scxGVoeMC7pXYz7EGMEbTDjyzlxtXdhq69mgfd9PHA6srPmLfpVUmIRy8wB0tyX7tONWp3iYELS_pXT4-SBCtctWGP2YWbXvBwhzhiBN7JnFsEXoqMT6jPFosw9fihbFPoDIVQ/s320/%E9%9D%A2%E6%9D%BF%E5%AE%89%E8%A3%9D.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">安裝面板(敏感的商標看不到)</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTHVyPPC5gIZQM6w4l9UkKUzykp9ATx2SH5yx5mIbI1SE_ht1cg3EopgNgEK89Bk-r1Je9qokSOsOJNxSJK9lm5yq0CMNMf2dDVSljNHr7HvfGECuV32hRldJuahNk7Y_D5LggbxJPBj4tbigkN1yiYd4NuKSw7ObnxJAyjfaDWNa5TwMkwV93syanKg/s2000/%E9%9F%B3%E9%87%8F%E9%9B%BB%E6%BA%90%E9%96%8B%E9%97%9C%E5%AE%89%E8%A3%9D.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTHVyPPC5gIZQM6w4l9UkKUzykp9ATx2SH5yx5mIbI1SE_ht1cg3EopgNgEK89Bk-r1Je9qokSOsOJNxSJK9lm5yq0CMNMf2dDVSljNHr7HvfGECuV32hRldJuahNk7Y_D5LggbxJPBj4tbigkN1yiYd4NuKSw7ObnxJAyjfaDWNa5TwMkwV93syanKg/s320/%E9%9F%B3%E9%87%8F%E9%9B%BB%E6%BA%90%E9%96%8B%E9%97%9C%E5%AE%89%E8%A3%9D.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">安裝兩個開關</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>接著裝在固定座上的環形變壓器(先確認輸入電壓是否與你所在的國家吻合),以走線合理的方向,用四個M4螺絲固定在中間隔板上,然後可以開始配線。套件附的0.1uF安規電容,請焊在電源開關上;100R電阻,請焊在機箱接地插座與AC電源座的地之間;機箱地要焊在PCB主板的地;橘色LED要延長接在主板有個標示+ -的位置,極性不要弄錯,而LED插在面板電源開關的下方。<br /><div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3yyq2twMcmTGg3coksjEp9pmftbHCe73VQDpWhX1fTnWYr1OtT7b5pIk5GAlgagVAnG3MXiwrgmIYjh01tJ3E9m1r-3e5OK7llWcGuHY0ut3zJq5dZxvOSOlkYl2OIcYHvn0eJDS5ekiO5fzLLLWecGWG26FQp6HMdZr8EKwlMAa0Pzv_D3bl67BiSA/s2000/%E8%AE%8A%E5%A3%93%E5%99%A8%E5%AE%89%E8%A3%9D.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3yyq2twMcmTGg3coksjEp9pmftbHCe73VQDpWhX1fTnWYr1OtT7b5pIk5GAlgagVAnG3MXiwrgmIYjh01tJ3E9m1r-3e5OK7llWcGuHY0ut3zJq5dZxvOSOlkYl2OIcYHvn0eJDS5ekiO5fzLLLWecGWG26FQp6HMdZr8EKwlMAa0Pzv_D3bl67BiSA/s320/%E8%AE%8A%E5%A3%93%E5%99%A8%E5%AE%89%E8%A3%9D.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">裝上變壓器</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSYv90tcOABYC0nPs2XvivEUNnOCg3gP6q6ZNgX-Y89ub4wjr2hh2OmruIBYJR-bc1JZhDTpZu7p5oRC8xbz_kuZWhf8HioDs8fqxqsp6LufhZUCok993S4RcHtwTfZuUxcGrKNrFtRTTHgxyTqmUFQv9zkJ2W-VO5BBcKeWpSCEcxfOPw8b71ECQZuw/s2000/%E8%AE%8A%E5%A3%93%E5%99%A8%E9%96%8B%E9%97%9CLED.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSYv90tcOABYC0nPs2XvivEUNnOCg3gP6q6ZNgX-Y89ub4wjr2hh2OmruIBYJR-bc1JZhDTpZu7p5oRC8xbz_kuZWhf8HioDs8fqxqsp6LufhZUCok993S4RcHtwTfZuUxcGrKNrFtRTTHgxyTqmUFQv9zkJ2W-VO5BBcKeWpSCEcxfOPw8b71ECQZuw/s320/%E8%AE%8A%E5%A3%93%E5%99%A8%E9%96%8B%E9%97%9CLED.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">變壓器,電源開關與LED的配線</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWggq2iOXle3yuuIYEbw-EynmV5oJVlnmoC-HrZzDpYhbkPctiwh4UYQfjNrp0Zu1738kkSq0kzeC08mplvUr9uFpkaRmBmR_7SDvrL5Wtl5s0EaATYPGES7Rz4i-wyK2Y1DYi1vERUlhijj4IJbdJBcIs2Yax5FRgecVvovyj9daVlBxsl4lyswLIAA/s2000/%E9%9B%BB%E6%BA%90%E4%BF%9D%E9%9A%AA%E7%B5%B2%E5%9C%B0%E7%B7%9A.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWggq2iOXle3yuuIYEbw-EynmV5oJVlnmoC-HrZzDpYhbkPctiwh4UYQfjNrp0Zu1738kkSq0kzeC08mplvUr9uFpkaRmBmR_7SDvrL5Wtl5s0EaATYPGES7Rz4i-wyK2Y1DYi1vERUlhijj4IJbdJBcIs2Yax5FRgecVvovyj9daVlBxsl4lyswLIAA/s320/%E9%9B%BB%E6%BA%90%E4%BF%9D%E9%9A%AA%E7%B5%B2%E5%9C%B0%E7%B7%9A.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">背板地線的配線</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgoZFs0ShLnBIsRCMHFnERE7Lbu3uMSEw6d-u8Hx4ATYqrObUCrh-PAW5oRl-3S9a5i55DfDPEsXQ-slkTCHmdybpmLmiEqNHW6G0m0kM6DhHdxNlVG69dqz87uR7ofUsScKaB_0OBLbU5wdfG9qe-dehaU6t1__CYLhW_do1TRmgUD92iVte1q5fVJwg/s800/%E6%8E%A5%E7%B7%9A%E7%A4%BA%E6%84%8F%E5%9C%96.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="649" data-original-width="800" height="260" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgoZFs0ShLnBIsRCMHFnERE7Lbu3uMSEw6d-u8Hx4ATYqrObUCrh-PAW5oRl-3S9a5i55DfDPEsXQ-slkTCHmdybpmLmiEqNHW6G0m0kM6DhHdxNlVG69dqz87uR7ofUsScKaB_0OBLbU5wdfG9qe-dehaU6t1__CYLhW_do1TRmgUD92iVte1q5fVJwg/s320/%E6%8E%A5%E7%B7%9A%E7%A4%BA%E6%84%8F%E5%9C%96.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">接線示意圖</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>都裝好確認無誤後,就可以插上管子。我手上剛好沒有12AX7,套件也沒有附,承蒙DIY界的同伴Russ大哥奧援,小弟深深的一鞠躬。</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjBm7XfMPo7OrM_kbabUsvUvmcLiN-zPFn8gwqNOB9YKy4RBIASlFfatX2s8QMSeuCjojpC_EXyowOoBiG0P41ajVVPPkskIDIMrGW1SxWJR6ky5ouA5u09Q-oDCtiU44GJYfDFuF3f6DnCCSU-YjFsNLYcR0yJhkOimGcwDJtzrcqBRDJtTBUJTh3OcQ/s2000/12ax7-EH.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjBm7XfMPo7OrM_kbabUsvUvmcLiN-zPFn8gwqNOB9YKy4RBIASlFfatX2s8QMSeuCjojpC_EXyowOoBiG0P41ajVVPPkskIDIMrGW1SxWJR6ky5ouA5u09Q-oDCtiU44GJYfDFuF3f6DnCCSU-YjFsNLYcR0yJhkOimGcwDJtzrcqBRDJtTBUJTh3OcQ/s320/12ax7-EH.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;">Russ兄寄來的EH 12AX7</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKuILT1sJPmXwlnB-VJucbhRzd0dk_kW8QqeF63ZkDi5R7_n7VjV1ieoF-CAXKoIkmx5Hq5c7bidSknRR6eahwE4hSMZo1BH_jxdjWTEQleKfmm3-aUyQYmZ-YCNYr0jVHOaMze3IvndSOtksULlPQofUscNEJ1r3ySi3hCdqQwo7yq6uV0tWCV9d__w/s2000/12ax7-3PCS.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKuILT1sJPmXwlnB-VJucbhRzd0dk_kW8QqeF63ZkDi5R7_n7VjV1ieoF-CAXKoIkmx5Hq5c7bidSknRR6eahwE4hSMZo1BH_jxdjWTEQleKfmm3-aUyQYmZ-YCNYr0jVHOaMze3IvndSOtksULlPQofUscNEJ1r3ySi3hCdqQwo7yq6uV0tWCV9d__w/s320/12ax7-3PCS.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">3支管子插好</div><div><br /></div>至於板上的MC升壓器,待日後要升級的時候再來處理了.....<div><br /></div><div>最後裝上機箱上蓋,就可以試音了。試音過程中發現有一個聲道沒有聲音,於是再打開上蓋,用訊號產生器跟示波器檢視,發現板子好像有地方(疑似管座焊點)接觸不佳,於是再整個拆開,把管座還有一些焊點再補焊一次,再檢視,問題沒了。</div><div><br /></div><div>再次接上音響,果然那柔美充滿旋律感的聲音出現了,讓人神迷。以套件來說,真的非常的好聽,但如果在一些零件上做升級,想必能夠提升它的音質更多,這就期待下次有空時再進行,現在應該是好好享受音樂的時光~~</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUP7r9kXJAEM1MlBB3diwBQgS1gNJEz8-sVfZdeD1ALh_VuZAXkZ55uyHacv8Rd3TRxBgJwj7ejnSOACwZEUIs92FN66jLzkIn1ZAs9pxfDZs5swCXSF228ZgR9S3bFXzmu8I3k5E6qRtk-08CT-APphNAw23e4LNibP9rzZVccoKYX8VfHLOQ0sZ7EA/s2000/finished_NO_title.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1344" data-original-width="2000" height="215" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUP7r9kXJAEM1MlBB3diwBQgS1gNJEz8-sVfZdeD1ALh_VuZAXkZ55uyHacv8Rd3TRxBgJwj7ejnSOACwZEUIs92FN66jLzkIn1ZAs9pxfDZs5swCXSF228ZgR9S3bFXzmu8I3k5E6qRtk-08CT-APphNAw23e4LNibP9rzZVccoKYX8VfHLOQ0sZ7EA/s320/finished_NO_title.jpg" width="320" /></a></div><br /><div><br /></div><div>再補充說明一下,套件的電路似乎與前面的原廠電路有些出入,板子上有多了兩個小黑豆,電阻跟一些零件也有不同,於是在裝機之前,我逆向了電路,以及綜合我在網路上查的資訊,得到以下的電路圖:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTG52N24b5mvsF9u_rBjAbRAqnzWySxvBYHpt-tw453155Iluzb8vRIVR-Wlj_60GOQndSmryCnJAkWfwbM8HqRXTChnchbbai7oLOf9t5C96E-tsfkQeoR5bKgoou9HaqqFr6vAAQVzjmgZ91DlS1kIpqj2HwkaO4hu2gTOUEk0TAfZaARgbatFjcQQ/s3000/EAR834P_2012.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1288" data-original-width="3000" height="137" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTG52N24b5mvsF9u_rBjAbRAqnzWySxvBYHpt-tw453155Iluzb8vRIVR-Wlj_60GOQndSmryCnJAkWfwbM8HqRXTChnchbbai7oLOf9t5C96E-tsfkQeoR5bKgoou9HaqqFr6vAAQVzjmgZ91DlS1kIpqj2HwkaO4hu2gTOUEk0TAfZaARgbatFjcQQ/s320/EAR834P_2012.jpg" width="320" /></a></div><br /><div><br /></div><div>主要的更動是在輸入級,用一個N-JFET串疊真空管,屏極負載電阻變動,柵極偏壓在6V左右。這樣可以減少12AX7本身的Miller效應,對大部分的MM唱頭更為友善,加分。</div>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-91821714458405264172022-04-19T13:20:00.003+08:002022-04-19T13:20:49.097+08:00 DS 805PP 維修調整<p>前幾年國內DIY網站<a href="https://www.facebook.com/groups/diysong" target="_blank">Diysong</a>推出了一套805PP的真空管後級套件,當時我未躬逢其盛,僅略有耳聞。最近承DS站長李大的幫助,幫我招攬一些代裝及維修的工作,於是接到了一份整理805PP的案子。</p><p>805PP的結構,是以6SN7作放大以及PK分相,再去推動一對6L6;6L6PP推動級間變壓器,次級自給偏壓去推動一對805,然後由變壓器輸出並且拉回授到第一級的陰極。以下是沒有強放級的電路。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjIbQJPd400PPFIk4-L44biu2H3WLZLUyGvsugNMOV477StJKOgznSyY9fjzHWORu05ld0LO9k0DONyZeqwNMRCE5NE1voYZP5EonABleKcngl9BQJ8Bwhx2l03p21PCni4BjbmZIg9AferhapDGRCg9dBpf-NEkff5pmAsyX-TNxbv_4jXPfnyhnBVA/s3000/805PP_20151102%E9%9B%BB%E8%B7%AF%E5%9C%96.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2023" data-original-width="3000" height="216" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjIbQJPd400PPFIk4-L44biu2H3WLZLUyGvsugNMOV477StJKOgznSyY9fjzHWORu05ld0LO9k0DONyZeqwNMRCE5NE1voYZP5EonABleKcngl9BQJ8Bwhx2l03p21PCni4BjbmZIg9AferhapDGRCg9dBpf-NEkff5pmAsyX-TNxbv_4jXPfnyhnBVA/s320/805PP_20151102%E9%9B%BB%E8%B7%AF%E5%9C%96.jpg" width="320" /></a></div><p><br /></p><p>805這管子,是需要柵極正偏壓的A2類放大,此處使用級間變壓器,也是為了提供正偏壓所需要的柵極電流,這邊的正偏壓大約是16V,如此805管子的偏流大約在100mA左右(這邊有點憑記憶,希望沒寫錯)。</p><p>這是網路擷取的裝機圖與套件圖,驅動級全部設計在一片PCB上,讓製作簡單了許多。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg85gV7Oz1S6cytBMkdfZUnUENG2xHUQ5XLtrxAdZrGSAXiBEa93AjYFchrkwC7B1_bglYF50IdPmjACtWpvC1Oh0JHqpP1PSs1_37FhRSqVrc1b-D8d_ygbLD4rsNxcLlGdqzLrxb5tAzWO-fvmD-fMFIjxO18AqcLk8TNyAUtR2l5WZTonamafg1K2A/s640/DS%20%E6%B8%AC%E8%A9%A6%E5%9C%96.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg85gV7Oz1S6cytBMkdfZUnUENG2xHUQ5XLtrxAdZrGSAXiBEa93AjYFchrkwC7B1_bglYF50IdPmjACtWpvC1Oh0JHqpP1PSs1_37FhRSqVrc1b-D8d_ygbLD4rsNxcLlGdqzLrxb5tAzWO-fvmD-fMFIjxO18AqcLk8TNyAUtR2l5WZTonamafg1K2A/s320/DS%20%E6%B8%AC%E8%A9%A6%E5%9C%96.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4WSeNBcK-sc998GTIWan1kTp7e8XVYafzS_cBZgqe9H4sM-RwWwN8a9hm5weRGrVQgmOKOQNqyydR0ur0_e6UsGgdBdk4NUVMSBLvpP-t10dnYoibJYW_oOCy10jSsm5zs35s0jGKckgUghH6_NCXCStU3uJ_dwcbYq0IXF0NP9IqP5RVCl6a1DvwLg/s1504/%E5%A5%97%E4%BB%B6%E5%9C%96.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1090" data-original-width="1504" height="232" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4WSeNBcK-sc998GTIWan1kTp7e8XVYafzS_cBZgqe9H4sM-RwWwN8a9hm5weRGrVQgmOKOQNqyydR0ur0_e6UsGgdBdk4NUVMSBLvpP-t10dnYoibJYW_oOCy10jSsm5zs35s0jGKckgUghH6_NCXCStU3uJ_dwcbYq0IXF0NP9IqP5RVCl6a1DvwLg/s320/%E5%A5%97%E4%BB%B6%E5%9C%96.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><p><br /></p><p>網友說他的套件組好後有哼聲,於是送來給我幫忙查看。機器非常非常的重,光搬一部就快要命了,畢竟沉重的鐵心元件才是好聲的保證,也沒辦法。把上板直接拆起,先以目視檢查,發現有些地方的AC沒有絞線,805燈絲沒有改直流,先從這兩個地方下手看看。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhc6qaP2XQPRF9PP9lswF9kHwYbe1By1_z55jzi6HggjFh1T4snKny3pPU68rDgzqNIFcW711a_rctiR2JosvZpn8knl3HgZtknC_13c61qO8C8nQ2YTSUsSDgaNPNTud6Y7BsYZHW6okmVjLm-Ec8ZAXPKB7FkAK5ePqRlG4LXufsA7j9GfYcydHOUWQ/s2000/%E6%9C%AA%E6%94%B901.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhc6qaP2XQPRF9PP9lswF9kHwYbe1By1_z55jzi6HggjFh1T4snKny3pPU68rDgzqNIFcW711a_rctiR2JosvZpn8knl3HgZtknC_13c61qO8C8nQ2YTSUsSDgaNPNTud6Y7BsYZHW6okmVjLm-Ec8ZAXPKB7FkAK5ePqRlG4LXufsA7j9GfYcydHOUWQ/s320/%E6%9C%AA%E6%94%B901.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">未改動</div><p><br /></p><p>把AC線重新整理,並且加上了橋式整流與大電容給805燈絲,再接上喇叭,哼聲稍有改善但是依然存在,於是聯絡站長,李大的建議是把驅動級的電容加大,我就從善如流,從<a href="https://www.mouser.tw/" target="_blank">Mouser</a>訂了560uF與470uF的高壓電容,把原本的120uF換下來,再觀察驅動級的高壓,果然120Hz的漣波降到非常低,感應到805柵級的哼聲也同時幾乎消除了。再來就順手把120uF給並在805高壓電源電路上,把驅動級燈絲也改成直流,輸入改成隔離線...等等的哼聲對策。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWikG_3nfX35v6MuyvRtCcWm8hEAWJPL1CaCV2Oga_7o0T68lbnh5e8PQzyTbs_nYXEeP8KTgB0zZ67Dnc4OjyliUVzrX2XP25CWIXj_pGQ8dyGrPL0dqXEXjwjFyN9UGPmqZVK2THJZw2R6YCzHptQY_ue3zrtVVQ_60qPrcjyFRctd1nv_nn1pYKqg/s2000/%E7%B5%9E%E7%B7%9A-2022-3-8-21-50-01.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWikG_3nfX35v6MuyvRtCcWm8hEAWJPL1CaCV2Oga_7o0T68lbnh5e8PQzyTbs_nYXEeP8KTgB0zZ67Dnc4OjyliUVzrX2XP25CWIXj_pGQ8dyGrPL0dqXEXjwjFyN9UGPmqZVK2THJZw2R6YCzHptQY_ue3zrtVVQ_60qPrcjyFRctd1nv_nn1pYKqg/s320/%E7%B5%9E%E7%B7%9A-2022-3-8-21-50-01.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">把AC的線重新絞合整理</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirkY9EC_MrZ_7CAUL3yLkjzkJ0Nj2uFRm_9QEhnKeH-M59gq8EittPOqpxkScF72F2ijzpmyFFieJFlHktvTWQ3lIlSdiHXwjakdzH6i_yQU23L_kcPRWFNS47d4GzcCgMxvTp3dQe4qzXt-ILlCZF3Nr0HraUj_NRoOZGDXBzosR6kvFR2BhCrV69rQ/s2000/%E7%B5%9E%E7%B7%9A-2022-3-18-14-53-16.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirkY9EC_MrZ_7CAUL3yLkjzkJ0Nj2uFRm_9QEhnKeH-M59gq8EittPOqpxkScF72F2ijzpmyFFieJFlHktvTWQ3lIlSdiHXwjakdzH6i_yQU23L_kcPRWFNS47d4GzcCgMxvTp3dQe4qzXt-ILlCZF3Nr0HraUj_NRoOZGDXBzosR6kvFR2BhCrV69rQ/s320/%E7%B5%9E%E7%B7%9A-2022-3-18-14-53-16.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;">805直流燈絲加上10000uF電容</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjq0SxnvGhrVGaJB8X0nAOqfgfaVPhmGrIvf2Osg0uLp1_VQwRXY6aqXdO1RLd0RL8xwrXV3hOHMdpKvJO-AbRp5OlK07V_hLeYUWQNCIFw_mrSm9jZ_JUxERVBWCsafkPxmjMDM0W6c18wHTIku8HCYGA4sS94MuJrQfeh-bWPCRFwHWvWaVU1rflJlA/s2000/%E7%B4%9A%E9%96%93%E9%87%8D%E8%B7%B3%E7%B7%9A-2022-3-21-21-27-29.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjq0SxnvGhrVGaJB8X0nAOqfgfaVPhmGrIvf2Osg0uLp1_VQwRXY6aqXdO1RLd0RL8xwrXV3hOHMdpKvJO-AbRp5OlK07V_hLeYUWQNCIFw_mrSm9jZ_JUxERVBWCsafkPxmjMDM0W6c18wHTIku8HCYGA4sS94MuJrQfeh-bWPCRFwHWvWaVU1rflJlA/s320/%E7%B4%9A%E9%96%93%E9%87%8D%E8%B7%B3%E7%B7%9A-2022-3-21-21-27-29.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;">其中一個級間重新拆裝轉向</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRYj5BDJZlcP-Z5igH42VNEBE33yVz4jfay5S6226ooV8mokDwTO4rxlHuiJo6gurFk-M-50-SvqZ8Dxjzhf0ARqMbtk8tnoNVhhjYIqnjuJ2G-X4voAAADnawAqp57nQBB4YaXT4HSgsRzUa_NhSxLr-WhLqQEMOYmHqtstY0wJkP2xbkFec8Tadz0w/s2000/%E8%BC%B8%E5%85%A5%E7%AB%AF-2022-3-22-13-47-36.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRYj5BDJZlcP-Z5igH42VNEBE33yVz4jfay5S6226ooV8mokDwTO4rxlHuiJo6gurFk-M-50-SvqZ8Dxjzhf0ARqMbtk8tnoNVhhjYIqnjuJ2G-X4voAAADnawAqp57nQBB4YaXT4HSgsRzUa_NhSxLr-WhLqQEMOYmHqtstY0wJkP2xbkFec8Tadz0w/s320/%E8%BC%B8%E5%85%A5%E7%AB%AF-2022-3-22-13-47-36.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">輸入改屏蔽線</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiPTbxBpJ3viIS4DYleyuQHmayfyijycdLgUW1-r_vyqt2sQxD_0gE9Sfn4IsNwZLZMCbqgBMOt3UQV8RiqBaMRXQG1yLZ3AEFrsJpzTIGvwlZtEmx9-Wrp7avK1cV86K7aDpT_ZHPs8qbqRQqAo2I7aGxa8mTmncTcC1H-fTjltRAc17fTKJ39_Y6bA/s2000/805%E7%87%88%E7%B5%B2-2022-3-24-14-17-34.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiPTbxBpJ3viIS4DYleyuQHmayfyijycdLgUW1-r_vyqt2sQxD_0gE9Sfn4IsNwZLZMCbqgBMOt3UQV8RiqBaMRXQG1yLZ3AEFrsJpzTIGvwlZtEmx9-Wrp7avK1cV86K7aDpT_ZHPs8qbqRQqAo2I7aGxa8mTmncTcC1H-fTjltRAc17fTKJ39_Y6bA/s320/805%E7%87%88%E7%B5%B2-2022-3-24-14-17-34.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;">透過橋整濾波以及RC再濾波</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmlz04tWW3VT23BaxYIh7on4a-uc04gKPeA3_ihQEU1q2vKIYKiZvqlkCM7KMO1JoEJpOLQlYuXBv1Dtagz-cnyz7ch2pHSzrI3FOhwfkn5tYXVRnG1UL9lNMgbWXK_X3f8WTfazNWtNFjC7ezEaB0wAbo-FwTBAT4DKeRKHSK9eXdI0tBMScr6MbqqQ/s2000/%E9%A9%85%E5%8B%95%E7%B4%9A%E7%87%88%E7%B5%B2-2022-3-24-14-17-37.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2000" data-original-width="1500" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmlz04tWW3VT23BaxYIh7on4a-uc04gKPeA3_ihQEU1q2vKIYKiZvqlkCM7KMO1JoEJpOLQlYuXBv1Dtagz-cnyz7ch2pHSzrI3FOhwfkn5tYXVRnG1UL9lNMgbWXK_X3f8WTfazNWtNFjC7ezEaB0wAbo-FwTBAT4DKeRKHSK9eXdI0tBMScr6MbqqQ/s320/%E9%A9%85%E5%8B%95%E7%B4%9A%E7%87%88%E7%B5%B2-2022-3-24-14-17-37.jpg" width="240" /></a> </div><div class="separator" style="clear: both; text-align: center;">驅動級燈絲也整流濾波</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDohsDAGCjjr8m8GecoVb7ps5oU4gGaurLrsua45Wef7OvBkSfA75ivJTuWAiN5cD0g1RNF-zRSRuK1ReDxs4pXxszcoEDTgPrRaV66htV10qFKIPPM9nm7uLyWqEfTvY12yQbpGEZw5jvPFCvtHNRbFUa8Tj1Ks2CgQPdpmcvoKUMrdKAx1jwza4cIQ/s2000/%E5%AE%8C%E6%88%90-2022-3-24-14-17-22.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1500" data-original-width="2000" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDohsDAGCjjr8m8GecoVb7ps5oU4gGaurLrsua45Wef7OvBkSfA75ivJTuWAiN5cD0g1RNF-zRSRuK1ReDxs4pXxszcoEDTgPrRaV66htV10qFKIPPM9nm7uLyWqEfTvY12yQbpGEZw5jvPFCvtHNRbFUa8Tj1Ks2CgQPdpmcvoKUMrdKAx1jwza4cIQ/s320/%E5%AE%8C%E6%88%90-2022-3-24-14-17-22.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">整理完成</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><p>此時再接回喇叭,真的要耳朵靠近喇叭5公分左右才有可聞的哼聲,算是工作完成了。順道提起,在測試過程中曾經發生一個聲道的聲音時有時無的狀況,查了好久,才發現焊在喇叭+輸出的線會晃動,因為熱漲冷縮造成接觸不良,這點還請各位在裝機的時候要注意,務必不要冷焊才好。</p><p>環形變壓器在滿載的狀況下會略為震動,透過金屬外罩會放大這個震動聲,若聆聽位置夠遠是不會有問題的。如果在裝機的規劃上,可以先灌膠再裝上機箱,那就更為完美了。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEFVv9kikkVbAUOs9vygukFJLOe8tAuazSd9jacQof7aBCZUBt1V9Kh6SdLSCPEKs8u6kI5acA1lwP5TOE34-De2WipPjtij9s5aXmru-Po_8CAXOcvwuDl9P8HE0MZxk5j_qKWqWwJtGyNU5NaIqUQRRi3ERnnlL3t28IrSZW5m4TYKimbJeZWTCDug/s2000/%E7%99%BC%E5%85%89%E4%B8%80%E9%83%A8-2022-3-25-16-52-48.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1218" data-original-width="2000" height="195" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEFVv9kikkVbAUOs9vygukFJLOe8tAuazSd9jacQof7aBCZUBt1V9Kh6SdLSCPEKs8u6kI5acA1lwP5TOE34-De2WipPjtij9s5aXmru-Po_8CAXOcvwuDl9P8HE0MZxk5j_qKWqWwJtGyNU5NaIqUQRRi3ERnnlL3t28IrSZW5m4TYKimbJeZWTCDug/s320/%E7%99%BC%E5%85%89%E4%B8%80%E9%83%A8-2022-3-25-16-52-48.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfpYDaTN_UtD0RrVFO3dxmQXntmBxbKz5zrw1KHe9QLlFF5LPQmg-LJj-3yv_PKak7xHJEO72XXrPkg_ELzr57v7hKktUoWiYQleGU_kfOZQ3j3xbupZwRIR3K1ozF1VuGonj1NeEfHUa6WfeldV7sbMYjuOKblf3DtjhmfSGYK1KfiZmt0Jeok-CJHw/s2500/%E7%99%BC%E5%85%89%E5%85%A9%E9%83%A8-2022-3-25-16-52-53.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1042" data-original-width="2500" height="133" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfpYDaTN_UtD0RrVFO3dxmQXntmBxbKz5zrw1KHe9QLlFF5LPQmg-LJj-3yv_PKak7xHJEO72XXrPkg_ELzr57v7hKktUoWiYQleGU_kfOZQ3j3xbupZwRIR3K1ozF1VuGonj1NeEfHUa6WfeldV7sbMYjuOKblf3DtjhmfSGYK1KfiZmt0Jeok-CJHw/s320/%E7%99%BC%E5%85%89%E5%85%A9%E9%83%A8-2022-3-25-16-52-53.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><p>805PP的耗電量很大,在冬天真的可以當作小暖爐來為室內加溫,他的燈火跟音樂都真的非常動人啊~~</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjZwKAGz8uOwiJvmH2vEkuDrfUD_JLEAAEARnCpDG25VdsnevA54Ri9YPXGSIXHqUNxYPZf-DEl1-9aT9kxuIqCBu3kqWJ2G1s2qzZJup9JXeojgYPCEPQ8R1vsm7-6Dap_Rn3kEwIYqb_4Mo7vBRRwFAZ-8uUK9xH0ifxvJtiS2IecclxVqsw5rdgsQ/s2500/%E7%99%BC%E5%85%89%E5%85%A9%E9%83%A8%E5%A4%9C-2022-3-24-22-27-34.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1012" data-original-width="2500" height="130" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjZwKAGz8uOwiJvmH2vEkuDrfUD_JLEAAEARnCpDG25VdsnevA54Ri9YPXGSIXHqUNxYPZf-DEl1-9aT9kxuIqCBu3kqWJ2G1s2qzZJup9JXeojgYPCEPQ8R1vsm7-6Dap_Rn3kEwIYqb_4Mo7vBRRwFAZ-8uUK9xH0ifxvJtiS2IecclxVqsw5rdgsQ/s320/%E7%99%BC%E5%85%89%E5%85%A9%E9%83%A8%E5%A4%9C-2022-3-24-22-27-34.jpg" width="320" /></a></div><br /><p><br /></p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-10737035713966206802022-03-06T17:57:00.000+08:002022-03-06T17:57:58.895+08:00Pioneer SX-535 整修<p> Pioneer SX-535是先鋒公司在1974年所開發製造的收音立體聲擴大機,內建低失真的FM接收放大線路,低誤差的唱頭放大電路,可提供兩部盤帶/卡座錄音及播放,加上一個Aux外部輸入端子。功率放大器部分也從過去的電容輸出電路,進步成使用對稱BJT元件的OCL電路,提供更為清澈低失真的音質。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhchNQM2HKOBKzd3tP-uvjGnry80JGyvs5T8u4SqolzSJcCn8hili9OScetMkv6HzF_-sbm0AiZDc4lol2N9f1nztvyu8bhqk95T_WrhzfK00VeeR2LxkcpDcDwcNBLidTVW4CaTs6v8h2_TDNbmDV2P0czPPEkTkfIrZ14Mm_tBDP6H-GxZ2hR1Gb9MA=s1000" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="526" data-original-width="1000" height="168" src="https://blogger.googleusercontent.com/img/a/AVvXsEhchNQM2HKOBKzd3tP-uvjGnry80JGyvs5T8u4SqolzSJcCn8hili9OScetMkv6HzF_-sbm0AiZDc4lol2N9f1nztvyu8bhqk95T_WrhzfK00VeeR2LxkcpDcDwcNBLidTVW4CaTs6v8h2_TDNbmDV2P0czPPEkTkfIrZ14Mm_tBDP6H-GxZ2hR1Gb9MA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><p style="text-align: left;">友人託為檢查這部機器,機器的外觀很不錯,木框及貼皮都算相當完整,機器內部看起來也沒有可見的損壞,不過不是很確定能否正常工作。將機器插上100V降壓變壓器,加上安全措施上電,前面板藍色的選台燈亮起真是美,然後看看有沒有異味什麼的,第一關過關了。</p><p style="text-align: left;">再來檢查輸出是否有直流,沒有直流就可以接上測試喇叭,從Aux輸入手機的音樂,開聲測試,耶耶聲音非常不賴!只是轉動音量與平衡時都會有雜音,選擇鈕似乎很久沒有轉動過了,非常緊,這些部分都可以透過清潔來回春。不過麻煩來了,切到Phono唱頭放大時,不但沒有音樂,而且有非常大的哼聲,這必須要好好檢查一下了。</p><p style="text-align: left;"><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgoai8X9d65jV4H1-BxDDFqZrY7D0p1mWiZhMiTv7vXS2Nby7WtS2mcNSuuyRfJd1omiGb2z9EykK9rwK4vIhwcechYjcc1IyflRLrmkpYgKTp_v9Hfl6778NvqO3gFfp2wqxh3xxx95lRBjds3iECh68UTw4fVNW0JbvUYN9uyTjq-fNLAu21sSERCBg=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEgoai8X9d65jV4H1-BxDDFqZrY7D0p1mWiZhMiTv7vXS2Nby7WtS2mcNSuuyRfJd1omiGb2z9EykK9rwK4vIhwcechYjcc1IyflRLrmkpYgKTp_v9Hfl6778NvqO3gFfp2wqxh3xxx95lRBjds3iECh68UTw4fVNW0JbvUYN9uyTjq-fNLAu21sSERCBg=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">古代的設計很人性,拆底板就可以檢查維修</div><p style="text-align: left;"><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgtW8U3MJBSSeA8aMzjCvAfzpBL-FNV4DFG2W07nC3YozNSzT8ufC4fkP9InnXIkUg83IBvMzcTkmCn9C_S4qt0yP8yl2OMa8siM5c7xGv1g5KutasEeXJtytq7ZFUR3bILrIiPMY5Z3qn7BRMNkpt4XSxcCmDmLTsdSOvq8zKwggHpZY5a9hCJbiBzHA=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEgtW8U3MJBSSeA8aMzjCvAfzpBL-FNV4DFG2W07nC3YozNSzT8ufC4fkP9InnXIkUg83IBvMzcTkmCn9C_S4qt0yP8yl2OMa8siM5c7xGv1g5KutasEeXJtytq7ZFUR3bILrIiPMY5Z3qn7BRMNkpt4XSxcCmDmLTsdSOvq8zKwggHpZY5a9hCJbiBzHA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">還未修理的唱放</div><br /><p style="text-align: left;">在維修任何機器前,一定要下載維修手冊或是電路圖,如此才不會花額外的時間去逆向查線還原。根據維修手冊,SX-535的唱放電路是兩級BJT共射級放大加上負回授,信號路徑上有電容交連跟旁路。使用小型手持電晶體/電容分析儀,先看電晶體,結果四個電晶體都是好的,再來要測電容,一看到板子上的是鉭質電容,就高度懷疑它是故障來源,果不其然,它是壞的,算是找到了兇手。回頭再看電路圖,訊號路徑總共有兩個3.3uF跟四個0.47uF,旁路有兩個22uF,3.3uF的確定掛了,考慮這部機器已經快50歲了,決定這幾個一併全換掉以保安康。</p><p style="text-align: left;"><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhflUJmUB0SuRX9_iEJihZeoex3qs_RwpCBwwG1_uXuQz02X-yltzC3saibo7bMFbLIy7OcK14FJDEEIahs1OJb8N_KVngvKJde0XZnSH5HjVAu7JMePoMxc_QPcmFsm-3aqrE2W1XnGD3BMfgwxeiuERRVgwYDkZexpHMTRHYLDJ_PUqNBsnvUsfuHTA=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEhflUJmUB0SuRX9_iEJihZeoex3qs_RwpCBwwG1_uXuQz02X-yltzC3saibo7bMFbLIy7OcK14FJDEEIahs1OJb8N_KVngvKJde0XZnSH5HjVAu7JMePoMxc_QPcmFsm-3aqrE2W1XnGD3BMfgwxeiuERRVgwYDkZexpHMTRHYLDJ_PUqNBsnvUsfuHTA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">ERO MKT1826電容</div><br /><p style="text-align: left;">因為板子所留的電容腳距是5mm的,現在拜科技進步,金屬膜電容已經可以做到那麼小,所以去佑昇購買ERO以及Philips的金屬膜5mm腳距電容,以及我自己有的Elna SilmicsII 22uF電解電容,全部給他換上去。</p><p style="text-align: left;"><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgnZvqfesFQ0sF1afUa-eacEKihZABlzF5RmlrR-3t225LqCS9xbk79CbxWkBlpRLUDiTupI8c9lVO-zhh0vZlFPXC8IXAWjSA2cUSKpXWQwgFZwCiAbw4Zb-zIHpXDrrLq-ITqxbhqqK-l_llrSaIiTQPwO279TGo1SimoEKF9ofuqDduxwYBWKxNDbQ=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1072" data-original-width="1600" height="214" src="https://blogger.googleusercontent.com/img/a/AVvXsEgnZvqfesFQ0sF1afUa-eacEKihZABlzF5RmlrR-3t225LqCS9xbk79CbxWkBlpRLUDiTupI8c9lVO-zhh0vZlFPXC8IXAWjSA2cUSKpXWQwgFZwCiAbw4Zb-zIHpXDrrLq-ITqxbhqqK-l_llrSaIiTQPwO279TGo1SimoEKF9ofuqDduxwYBWKxNDbQ=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">拆下的3.3uF 鉭質電容</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhZdqPbtVG6wuz7BwHc7k1sAdpR68H_yVMnEGWoy-ydrRoCgIYbIDkQUAYTZ1QW73IKcqwtkawkXCZAJ8NmNVXYE840ZVYo-6bKq68CVpRgGtyu8Ah4hWhLXSX1qbva-Xkf4T77mqlpDo9JOVfBys8Dw6weAS_YWYupy9FJrQbTYJTbrjv2cTurrhiPyQ=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEhZdqPbtVG6wuz7BwHc7k1sAdpR68H_yVMnEGWoy-ydrRoCgIYbIDkQUAYTZ1QW73IKcqwtkawkXCZAJ8NmNVXYE840ZVYo-6bKq68CVpRgGtyu8Ah4hWhLXSX1qbva-Xkf4T77mqlpDo9JOVfBys8Dw6weAS_YWYupy9FJrQbTYJTbrjv2cTurrhiPyQ=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">拆下的所有電容</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgU3JJ8nBLyX2FX8_bL0BfcBiX_yqxEf7PR0--6PIdhKdu8Xy1HdSjF_XQ_beps668WzotgKsxSiM1QDtrLb5hIzCo3nEJr0ElE4f_rAIar_2bdoHV_v3EyfhB7vSUQzUnZlKDkflGlDOTroDvrizpOiNAKmWGXBd2fVmRTtxjX0n39fhjT0OLoiyP5Kg=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEgU3JJ8nBLyX2FX8_bL0BfcBiX_yqxEf7PR0--6PIdhKdu8Xy1HdSjF_XQ_beps668WzotgKsxSiM1QDtrLb5hIzCo3nEJr0ElE4f_rAIar_2bdoHV_v3EyfhB7vSUQzUnZlKDkflGlDOTroDvrizpOiNAKmWGXBd2fVmRTtxjX0n39fhjT0OLoiyP5Kg=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">換上新零件的唱放板</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>換好後順便清潔所有旋鈕以及按鍵,輸出入端子也給它擦乾淨,再度接上唱盤,開機,落針,Dire Straits美好的吉他聲從喇叭流出,真是撫慰人心啊。於是一部老而彌堅的美麗audio時代產物,再次復活,繼續為我們播放出好聲音。<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhOZC0B0N71Tf6vOKL58lvCbPGZeJfzjRQA34lCEb8cA9_Bdcnha9Z2Q5UJQNczyypHXln3mqIsmafVNuOtVXQMmzEfCmE0JqGDe7LzsWM4Qd4M83RXctQexMeq_StIlGI3c3afheZDiO3eZ8sxdmUMaEbSwjI26JhRjH2QE6pmO8YtboYUKHqyFG8TLQ=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1102" data-original-width="1600" height="220" src="https://blogger.googleusercontent.com/img/a/AVvXsEhOZC0B0N71Tf6vOKL58lvCbPGZeJfzjRQA34lCEb8cA9_Bdcnha9Z2Q5UJQNczyypHXln3mqIsmafVNuOtVXQMmzEfCmE0JqGDe7LzsWM4Qd4M83RXctQexMeq_StIlGI3c3afheZDiO3eZ8sxdmUMaEbSwjI26JhRjH2QE6pmO8YtboYUKHqyFG8TLQ=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">正面,那藍色的類比光輝</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEicW9S9Md5vFH-cMQNz9Z0rX0vq0GeN8zqfoK1N-xC-vu4c-LLxz4o0kijGnT0Sb996w7TRK6naH8VZ5h5K_4eBzThpcngSlSaF0fumY8QvFAhJ-0TnwsSWvN4NH0QYf4dckz67hYlP5S3oHjEpeKwHUQdafOmRGacwsLFcp1XV3foU1Nykkg6Jwtw7Mg=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1050" data-original-width="1600" height="210" src="https://blogger.googleusercontent.com/img/a/AVvXsEicW9S9Md5vFH-cMQNz9Z0rX0vq0GeN8zqfoK1N-xC-vu4c-LLxz4o0kijGnT0Sb996w7TRK6naH8VZ5h5K_4eBzThpcngSlSaF0fumY8QvFAhJ-0TnwsSWvN4NH0QYf4dckz67hYlP5S3oHjEpeKwHUQdafOmRGacwsLFcp1XV3foU1Nykkg6Jwtw7Mg=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">背面</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjhvGFwV5uz_jm9dspRus7dVI9Nl6-UAi4YTH_K9bnMh_tpUcCDkMWCwPwfOOBuQV78M3YPOPMIa1FNJ9HFnDPoUUENm1bH2ZdQBI1r7m-IwNHE2RmVvDdd2_kKOi0lmPfBvKLvCIWXlNu9wpaIW2vBRodZ6D-AUU2lb4Cr14ayjBqPCoRJeEdOo4aD0Q=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1039" data-original-width="1600" height="208" src="https://blogger.googleusercontent.com/img/a/AVvXsEjhvGFwV5uz_jm9dspRus7dVI9Nl6-UAi4YTH_K9bnMh_tpUcCDkMWCwPwfOOBuQV78M3YPOPMIa1FNJ9HFnDPoUUENm1bH2ZdQBI1r7m-IwNHE2RmVvDdd2_kKOi0lmPfBvKLvCIWXlNu9wpaIW2vBRodZ6D-AUU2lb4Cr14ayjBqPCoRJeEdOo4aD0Q=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">美機</div><div><p style="text-align: left;"><br /></p></div>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-42451748119673064512022-01-20T16:15:00.000+08:002022-01-20T16:15:51.121+08:00Luxkit KMQ60 換電源變壓器<p><a href="https://audio-heritage.jp/LUXMAN/kit/kmq60.html"> Luxkit KMQ60</a>其實就是Luxman MQ-60的套件版,發行於1970年,使用6267/EF86 - 6AQ8/6DT8 - 50CA10,推挽結構,30W功率輸出。日本版套件使用的電源變壓器,編號S-1791,但是只有100VAC的初級輸入,可以代用的110V變壓器只有P-1590,若是從日本購入KMQ60或是MQ60,最好能夠順便找到P-1590這個變壓器換上。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgybmMmGE-dlQhOPEBMafrJAWbQmKRsA5qvUhltO98pXox1UkJv4RCrZ44vV02WSWxxtAaHqkfsQmLYJOdKJBKpjSzFI8HAtLUwjNjBGc8sEAzNEzFCZ1DmvJEzLUMXAdkb_t9ZaFD-MqCPW_hLlL5eVmlXQYiP3pcQuFfggtoum2IeJPGASswaiFlYyA=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="994" data-original-width="1600" height="199" src="https://blogger.googleusercontent.com/img/a/AVvXsEgybmMmGE-dlQhOPEBMafrJAWbQmKRsA5qvUhltO98pXox1UkJv4RCrZ44vV02WSWxxtAaHqkfsQmLYJOdKJBKpjSzFI8HAtLUwjNjBGc8sEAzNEzFCZ1DmvJEzLUMXAdkb_t9ZaFD-MqCPW_hLlL5eVmlXQYiP3pcQuFfggtoum2IeJPGASswaiFlYyA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">KMQ60,Luxman的設計很漂亮</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEi0hp83CD17wR1zEwLBOql3rg_ryaAkugg7bZNTwju4yUHlqSkY4IOI4pk6foNrVl3bsw5tQJaE7ejkpj59iO2iFBoqABr3BcXkZXm08Z-ELS49mGxCQXiSvtEm8YQHzTeyFB73vhXBqO9IWk3IEeIq8oTI5qACBPpYKjB02X2V_i2dpUmxnnci1mOkNA=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1032" data-original-width="1600" height="206" src="https://blogger.googleusercontent.com/img/a/AVvXsEi0hp83CD17wR1zEwLBOql3rg_ryaAkugg7bZNTwju4yUHlqSkY4IOI4pk6foNrVl3bsw5tQJaE7ejkpj59iO2iFBoqABr3BcXkZXm08Z-ELS49mGxCQXiSvtEm8YQHzTeyFB73vhXBqO9IWk3IEeIq8oTI5qACBPpYKjB02X2V_i2dpUmxnnci1mOkNA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">原來的電源變壓器</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjeZ7sXchoQ3X9TZtPXPIiX5METSwBltBxEhyTJ0EjaAQ86J1K5WnlGAY14uZBHKn0keg2ezSR7qyNcxntBB9SsrH4BoTeqZpnZzKhwZ0QssT1Fesuv-hvRhfVAkpwjn3KaXVIWUdR9dn2_kCK4-VmXZ2lRY5TqXtByw8aoL_p7nTFOXfpK9KLNJavXYQ=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEjeZ7sXchoQ3X9TZtPXPIiX5METSwBltBxEhyTJ0EjaAQ86J1K5WnlGAY14uZBHKn0keg2ezSR7qyNcxntBB9SsrH4BoTeqZpnZzKhwZ0QssT1Fesuv-hvRhfVAkpwjn3KaXVIWUdR9dn2_kCK4-VmXZ2lRY5TqXtByw8aoL_p7nTFOXfpK9KLNJavXYQ=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">原變壓器的走線,更換時要拍照存檔以便比對</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhmNhoIOACHWpi4mpNkoJttO8MAU_c6qKDyQEuEsj__JeKQ2shSJ0iDtUDnIa5ah5aD3ho6K6PaN_MZF83NHgz_wFesMQA41yJpR7Gqvuj_Sr8wydqi3VooGmYpFttqIx4rIlI38zFqDEUQrD-FUXRcJusdDaz3x8voOUPpLAlxHwfIgJEt38jmWDCc1g=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1014" data-original-width="1600" height="203" src="https://blogger.googleusercontent.com/img/a/AVvXsEhmNhoIOACHWpi4mpNkoJttO8MAU_c6qKDyQEuEsj__JeKQ2shSJ0iDtUDnIa5ah5aD3ho6K6PaN_MZF83NHgz_wFesMQA41yJpR7Gqvuj_Sr8wydqi3VooGmYpFttqIx4rIlI38zFqDEUQrD-FUXRcJusdDaz3x8voOUPpLAlxHwfIgJEt38jmWDCc1g=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">螺絲藏得比較深,要耐心慢慢拆起</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgxExGQWy0s0T-TQ_d8oklXr_gUlqJerOVeSDiMzdejT09odh_EKmZSQcia_Pmno5DDhmRXQ1iRfA5Zh8rnONzxcrpCm46YHmYNdNH9NZtiGeRU0yxPgmRYHEaooB2HDOG_UWBMpGoaJrqYS0g9tWLWohpxXwsHnJX_l1vS87IveVjLdR1baOdR4zSTRw=s930" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="518" data-original-width="930" height="178" src="https://blogger.googleusercontent.com/img/a/AVvXsEgxExGQWy0s0T-TQ_d8oklXr_gUlqJerOVeSDiMzdejT09odh_EKmZSQcia_Pmno5DDhmRXQ1iRfA5Zh8rnONzxcrpCm46YHmYNdNH9NZtiGeRU0yxPgmRYHEaooB2HDOG_UWBMpGoaJrqYS0g9tWLWohpxXwsHnJX_l1vS87IveVjLdR1baOdR4zSTRw=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">電源部分的線路圖要印出備查</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiCIyNMd0g43YOrLzZjf7ofGUxhUV_7YEnz9VjtEjq8ZVxK4igbGLufle4Fq-l0U0lIFhcwW9EaCmksbqa15-FOAoJlhR4qw3MWpRgUq8xXGvNWCyN2wkMXHm7hmoHTmRqA_rJy3UzOCa-tDaXBw_5H8kJk5Rw7sPlRWt9Mw1sDIjFd072EtSM8Rf1YXw=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="833" data-original-width="1600" height="167" src="https://blogger.googleusercontent.com/img/a/AVvXsEiCIyNMd0g43YOrLzZjf7ofGUxhUV_7YEnz9VjtEjq8ZVxK4igbGLufle4Fq-l0U0lIFhcwW9EaCmksbqa15-FOAoJlhR4qw3MWpRgUq8xXGvNWCyN2wkMXHm7hmoHTmRqA_rJy3UzOCa-tDaXBw_5H8kJk5Rw7sPlRWt9Mw1sDIjFd072EtSM8Rf1YXw=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">拆下的變壓器與要換上的變壓器,次級出線位置不同</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEizNuMO0IikvvEda-_IUhDv0Ja_GdASxeJYfzPZGQ1GKdVLnEOATn0f3FhuRW8x8CJgbEjdhb3yJyZkioL60l5Kkv84a8dueaxvLLILVtsCtxwGYvZvgct-xddP9kOHqyjle1WGkIgixmhtCDin3ojKjDsEbE488j9ZxhJo0hZ98wcvH5CCss8d4UNfEg=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEizNuMO0IikvvEda-_IUhDv0Ja_GdASxeJYfzPZGQ1GKdVLnEOATn0f3FhuRW8x8CJgbEjdhb3yJyZkioL60l5Kkv84a8dueaxvLLILVtsCtxwGYvZvgct-xddP9kOHqyjle1WGkIgixmhtCDin3ojKjDsEbE488j9ZxhJo0hZ98wcvH5CCss8d4UNfEg=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">換好的變壓器,走線位置要調整</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgmPk55-eiisn2-W0z5zfTcAvhJj_NaSNk-ZE_W13X8at7R-Robk8ttVqnzAFQIvSaxwt1MjLqEUNOO7ilveBEyzxW3jCPPvUV0B2yNq0r8henYxyJu7FUK17fFUrIKLppv1wxtO6mk_gH8AEkk4SnrAo8MeR5VlPH26LJbDLg0-twtP9wtW1fxpXjNKQ=s1600" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1028" data-original-width="1600" height="206" src="https://blogger.googleusercontent.com/img/a/AVvXsEgmPk55-eiisn2-W0z5zfTcAvhJj_NaSNk-ZE_W13X8at7R-Robk8ttVqnzAFQIvSaxwt1MjLqEUNOO7ilveBEyzxW3jCPPvUV0B2yNq0r8henYxyJu7FUK17fFUrIKLppv1wxtO6mk_gH8AEkk4SnrAo8MeR5VlPH26LJbDLg0-twtP9wtW1fxpXjNKQ=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">底部全貌</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><div><br /></div>換好變壓器之後,在未插真空管的狀態下,先上電,確認沒有短路或漏接,量一下初次級電壓是不是正常,然後量一下50CA10負偏壓會不會太低以防偏流過大。然後插上所有真空管,上電,再次量測燈絲電壓,次級高壓,然後調整兩聲道的負偏壓以及功率管平衡偏壓,就大功告成了。接上喇叭開聲時有嚇到,完全沒有哼聲不說,聲音的密度跟光澤感真的非常棒,不愧是日本在音響黃金年所製作出的珍貴寶物啊。<br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><p><br /></p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-88129628156813550152022-01-15T19:18:00.001+08:002022-01-17T09:11:34.042+08:00Audio Innovations Series 500 再維修<p> 這部經典管機AI S500,為何說是再維修呢?機子的主人是我同學,因為好幾好幾年前,我曾經幫它換了蠻多發燒零件的,像是ERO的電阻,RIFA電容,Sfernice的音量....等等,後來他也拿給其他師傅修過,然後閒置了好一陣子,最近給西門老張修過變壓器之後,有些不大不小的問題就不麻煩他老人家,轉而抱來我這邊啦。</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiyZ41pjbu6RAqAS32ibKr7-KRWNbJ6s-aMkxSJscJvmp1DhrK5HYj0D58IKvWM1EhvT-W3tU0P2_rAxDciv24w1W80g3SYQckh3-Khe4zonD45OYRG8naLCxjVWfqff8zMbV8PhggcioTLkBlqZM9DdO6YMBBn8pmh49g9Jzv5YEXacprIYJohuKY3PA=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEiyZ41pjbu6RAqAS32ibKr7-KRWNbJ6s-aMkxSJscJvmp1DhrK5HYj0D58IKvWM1EhvT-W3tU0P2_rAxDciv24w1W80g3SYQckh3-Khe4zonD45OYRG8naLCxjVWfqff8zMbV8PhggcioTLkBlqZM9DdO6YMBBn8pmh49g9Jzv5YEXacprIYJohuKY3PA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">AI S500,很乾淨漂亮的設計</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEggtjWvZsVjbqeXFfuV6Vy6Qwad8_OootVve_odHaF1kvKY_MuXtAAPyf2XvHVN81y1UecF25NeZk6OH2tv3Ayn-tCJLbOIZ7O1adcxL2ak2A-7fjXkeqsaTrr8mLg6gNyerPqYaZ5drAIKRgzU0bcXSn8Q-FTkyoaqpeTXlDneBjZzbv4pv-CaXBXT7g=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEggtjWvZsVjbqeXFfuV6Vy6Qwad8_OootVve_odHaF1kvKY_MuXtAAPyf2XvHVN81y1UecF25NeZk6OH2tv3Ayn-tCJLbOIZ7O1adcxL2ak2A-7fjXkeqsaTrr8mLg6gNyerPqYaZ5drAIKRgzU0bcXSn8Q-FTkyoaqpeTXlDneBjZzbv4pv-CaXBXT7g=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">之前幫他換的Sfernice太長,要改整齊</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>其實以前幫他改機的時候,我還不是那麼深入電路,只知道不管什麼好東西就給他來一點,所以萬幸沒有因此而燒機,算是不幸中的大幸了哈哈哈。打開底板,我才看到並想起我幹了甚麼好事。<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEh71wy2flpQlctsbddbL5DjkLmAL5PCfNu5jbtuuX7BdDa2ON9OkzJeqZaSDng5GStermRl4TB0Mu_5_naPP5BWaXBcNVrSNBFAZTjIFlL7dbemrV6yKHd6NCLJYWI_Mq37xWbJUHm6uXrNc7MeqvKc3n4QCnChJ_hjouxiR1bGcGvfSby9wvFWbIC7Bg=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="913" data-original-width="1600" height="183" src="https://blogger.googleusercontent.com/img/a/AVvXsEh71wy2flpQlctsbddbL5DjkLmAL5PCfNu5jbtuuX7BdDa2ON9OkzJeqZaSDng5GStermRl4TB0Mu_5_naPP5BWaXBcNVrSNBFAZTjIFlL7dbemrV6yKHd6NCLJYWI_Mq37xWbJUHm6uXrNc7MeqvKc3n4QCnChJ_hjouxiR1bGcGvfSby9wvFWbIC7Bg=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">看到很多ERO電阻,S+M電容,銀線</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEj784ReMo6K3_l_iYq0eKsLfH7TQAz_cH7IzAQI4FJBAKIlvRZt-BpBNSJ1fYV8Hgn0gbJ8XPoORsohEMHoJACboOiTWZH9ntzdmkc21q_tYCvfJR63VVWzg8hRESnIgfpmEthUK2l4s_u-OUeSzUxrxL0ro6uV_4DNgS_0pgSbG1O_PY8MGbmBjKKrJQ=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1070" data-original-width="1600" height="214" src="https://blogger.googleusercontent.com/img/a/AVvXsEj784ReMo6K3_l_iYq0eKsLfH7TQAz_cH7IzAQI4FJBAKIlvRZt-BpBNSJ1fYV8Hgn0gbJ8XPoORsohEMHoJACboOiTWZH9ntzdmkc21q_tYCvfJR63VVWzg8hRESnIgfpmEthUK2l4s_u-OUeSzUxrxL0ro6uV_4DNgS_0pgSbG1O_PY8MGbmBjKKrJQ=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">之前改的Sfernice 500K 音量</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjUshReFdPhQFH4WT5ZSBZzy7JqkRxxd4uQxPOT1EHenjjyzM8h8BfNtNCCYaUi238scB5o6YArjp_umlj9oYS-sPTjxZYwibubGXKyPnA34YAHAvPoWlnEzneQEnErBdOxn3yBm3zHUKsDatlfvl0zuqhesOb8xLF2RXiHfxMcPbBIWSSmiQiKj2iMBw=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEjUshReFdPhQFH4WT5ZSBZzy7JqkRxxd4uQxPOT1EHenjjyzM8h8BfNtNCCYaUi238scB5o6YArjp_umlj9oYS-sPTjxZYwibubGXKyPnA34YAHAvPoWlnEzneQEnErBdOxn3yBm3zHUKsDatlfvl0zuqhesOb8xLF2RXiHfxMcPbBIWSSmiQiKj2iMBw=s320" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEh2RMcdPn5RuFAwyR7mplqS495yq4XuXJSrY3bgSlxQ6_IDmp7-gFD7JiRY1QNPGjiQZOTGf0Yui_dXK6GZtluVQXIxEustunARhvzy1nspc4E-X5EvUzd-rCoSKOWpEkxfcApkJigJkQxAKHV-RpLHjlNtQR4d1PB4eG1gGOYC9vPxBXthDdF7-pNQvQ=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEh2RMcdPn5RuFAwyR7mplqS495yq4XuXJSrY3bgSlxQ6_IDmp7-gFD7JiRY1QNPGjiQZOTGf0Yui_dXK6GZtluVQXIxEustunARhvzy1nspc4E-X5EvUzd-rCoSKOWpEkxfcApkJigJkQxAKHV-RpLHjlNtQR4d1PB4eG1gGOYC9vPxBXthDdF7-pNQvQ=s320" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;">同時看到有三個原機高壓電容凸起了</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhdljjjZcx684MMO6lcik9HcJ93jEyudtO8FfigrTW2b4_Ru8MIL1qlHPcIOm3BgJOYC_171jhJBYzcIXbabfRgs-02pvjW8kGRo80yXBNe42Ne2yj2Ty8WknxEsSr73G5mmtnomkVJqKhTPa1gpy55CCI8iZ_Lz3dEJSRwcifLigk9tQUGbilh5LmXcA=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEhdljjjZcx684MMO6lcik9HcJ93jEyudtO8FfigrTW2b4_Ru8MIL1qlHPcIOm3BgJOYC_171jhJBYzcIXbabfRgs-02pvjW8kGRo80yXBNe42Ne2yj2Ty8WknxEsSr73G5mmtnomkVJqKhTPa1gpy55CCI8iZ_Lz3dEJSRwcifLigk9tQUGbilh5LmXcA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">用有磁性的盤子裝螺絲很安全</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>所以除了音量需要更換以外,這三個已經膨起來的33uF/350V高壓電容,也需要更換掉。友人已經先準備了一個從佑昇購買的<a href="https://www.yoson.com/index.php?route=product/product&path=395_222_106_168_169&product_id=13106" target="_blank">Alps RK27 100KA音量</a>,剩下的部分就我來準備吧。之前看到<a href="https://www.facebook.com/mai.ge.9/posts/4925765770776926" target="_blank">劉騰允前輩</a>推薦德國的Wurth電容,我沒有用過所以相當好奇,所以就跟<a href="https://www.mouser.tw/ProductDetail/Wurth-Elektronik/860241381004?qs=0KOYDY2FL2%2FX5nstEaek5A%3D%3D" target="_blank">Mouser</a>下訂了一些。其實只要是有品牌,規格尺寸相當的,都可以用在這裡,前提是,貨源必須是可靠的,千萬不要貪小便宜去買淘寶的東西,慘案很多請自行注意。另外可以順便清潔一下所有波段開關的接點,本來我想在台灣找看看有沒有Deoxit D5的噴劑,無奈只有國外有賣,於是就用WD-40電子接點清潔劑了。<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEg0KBGCBVVglkDVY_FiXYhlOj5BLeFPqttVanwhTXMcXcvW7RjLwkZpxpis3XNmL4wF1QtxMjdSi55vjOyJle1YxPPKdTuPW350Qz28YO-7DSUona7dO06HXbfiCKXEjRtEc4buRMd8tl4X7skB_mKpolNGx6kMZBaiJ3w5xOvgDrWU2O7wyUJr-KL9bA=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEg0KBGCBVVglkDVY_FiXYhlOj5BLeFPqttVanwhTXMcXcvW7RjLwkZpxpis3XNmL4wF1QtxMjdSi55vjOyJle1YxPPKdTuPW350Qz28YO-7DSUona7dO06HXbfiCKXEjRtEc4buRMd8tl4X7skB_mKpolNGx6kMZBaiJ3w5xOvgDrWU2O7wyUJr-KL9bA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">從Mouser進口的,安心</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEizt5IDH60R4MkveT38g4nbSqIWeSfUySt2h9ct-RHf-2YyXVXcgxpszU1hclX6D9Vjg-7yqUGI-fjDVeXD3_r7TfuWcvlIQhz-23wjmnzeYN_YX3Ah9Cp_mjVchKWdQzwPl6NSrdqYW_4p_3JVkMKIJc-RJqva7CJafsMdm5jIPE9UKPOAiv3VjqGS6g=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEizt5IDH60R4MkveT38g4nbSqIWeSfUySt2h9ct-RHf-2YyXVXcgxpszU1hclX6D9Vjg-7yqUGI-fjDVeXD3_r7TfuWcvlIQhz-23wjmnzeYN_YX3Ah9Cp_mjVchKWdQzwPl6NSrdqYW_4p_3JVkMKIJc-RJqva7CJafsMdm5jIPE9UKPOAiv3VjqGS6g=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">紅色的Wurth電容</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgrm3bm3W7yyBu-SEqv94hrQgAFLHuS7qlI4ufhwzc9A_bDnb7jlKVDGwomFoWok43BiBWWFHBwUZtw2PquO9_G1CdzacKToXRpR6O0FL2XvH22t5_MP8mAvZc808WIysu_JoFoQgpWNOc6G_VmaBY6C9rstWdGO_5gTcZq5YRMbM5OMPEjyg4fKt2cAw=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1060" height="320" src="https://blogger.googleusercontent.com/img/a/AVvXsEgrm3bm3W7yyBu-SEqv94hrQgAFLHuS7qlI4ufhwzc9A_bDnb7jlKVDGwomFoWok43BiBWWFHBwUZtw2PquO9_G1CdzacKToXRpR6O0FL2XvH22t5_MP8mAvZc808WIysu_JoFoQgpWNOc6G_VmaBY6C9rstWdGO_5gTcZq5YRMbM5OMPEjyg4fKt2cAw=s320" width="212" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">順便清潔一下所有接觸點</div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>記得要修理改機之前,到網路上去搜尋電路圖與維修手冊,才不會出問題不知道如何處理。原機三個故障電容有22uF與33uF,線路圖則是標示可以用33uF,所以我就全部改成33uF。<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgMCVRmERSNcRw1Hy5HjgCsAOEm4lGFF-apkSKC2BrlZGQpJpO6CNU0UVuTv8QMmbPSzymDJHSlpsjDRqnK5RG_cX7t_YDK-bLfp47Ay7kqpyWkYTQp7M_x3PAEQiSapfpqCFCdUxvUR6yn0e55Ua92q5rrx_aoJDGl6WVTgLKZUruWxO0MNGrhzvZ70g=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEgMCVRmERSNcRw1Hy5HjgCsAOEm4lGFF-apkSKC2BrlZGQpJpO6CNU0UVuTv8QMmbPSzymDJHSlpsjDRqnK5RG_cX7t_YDK-bLfp47Ay7kqpyWkYTQp7M_x3PAEQiSapfpqCFCdUxvUR6yn0e55Ua92q5rrx_aoJDGl6WVTgLKZUruWxO0MNGrhzvZ70g=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">這個拆起來蠻明顯有漏電解液</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEj1lBPp3gE3MAf3LSG8J5Y5eyUX5XgPgVglQ75JEWfJ6_bn0mFUkJ_yOUkZsHMTuCqs8jE32bMbO8u2_XzZSSet9-0yYicvlKMrVEsS6o4-G3AMwMYEtdlTmnEJeA3kNYMuJesFXhRnLuTgASUb4scXr6F6szeb6tAIKCrny7i-g9DqcxMoOHSrM7rf7g=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1060" height="320" src="https://blogger.googleusercontent.com/img/a/AVvXsEj1lBPp3gE3MAf3LSG8J5Y5eyUX5XgPgVglQ75JEWfJ6_bn0mFUkJ_yOUkZsHMTuCqs8jE32bMbO8u2_XzZSSet9-0yYicvlKMrVEsS6o4-G3AMwMYEtdlTmnEJeA3kNYMuJesFXhRnLuTgASUb4scXr6F6szeb6tAIKCrny7i-g9DqcxMoOHSrM7rf7g=s320" width="212" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">剩下兩個似乎還好</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhNy1D2WHtiDGeOKKSjtosE6c04um398gS0JIOqzk8wkZMp6M0tBsc81CALB2fdBqnBMMaH-GxsmAaJK-OTkVZMoqz4SamPWqxKoJff0Cu4Lk_Yv2lDxJSmw5fDh2edhuPHVvtNh5wBRY-dGMBV7WJCstQHZgXyjy88PYU3KLyNJ246HXako5f_WkvOsA=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEhNy1D2WHtiDGeOKKSjtosE6c04um398gS0JIOqzk8wkZMp6M0tBsc81CALB2fdBqnBMMaH-GxsmAaJK-OTkVZMoqz4SamPWqxKoJff0Cu4Lk_Yv2lDxJSmw5fDh2edhuPHVvtNh5wBRY-dGMBV7WJCstQHZgXyjy88PYU3KLyNJ246HXako5f_WkvOsA=s320" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEg050TETwvg1v_P6KPi1lpoF9GC0NnOI1sc0TC0Pao1OJdGH35YCmfSt0tTQiBRo5uO92xrjlrerNjwS6Yh7VVXZ6YtsYZs8ZXoUmRB2VZl4elcXvhdcomLthgDYMo56G6X-IoWvCJhZ0Ooi5QoHrE_ky-Tu_9u5wY9Bibll-QidFCz7hC0Myg5eIiOXw=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEg050TETwvg1v_P6KPi1lpoF9GC0NnOI1sc0TC0Pao1OJdGH35YCmfSt0tTQiBRo5uO92xrjlrerNjwS6Yh7VVXZ6YtsYZs8ZXoUmRB2VZl4elcXvhdcomLthgDYMo56G6X-IoWvCJhZ0Ooi5QoHrE_ky-Tu_9u5wY9Bibll-QidFCz7hC0Myg5eIiOXw=s320" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEj6ikz3PkisS3OLgpC7RPPyGvnovlut_-z3Yp5iuYD5xwhhJIXj76nlxr6dV-jSeqX7iKf0nxOZpM-AqykFQBCH42QPKPVrqP97H9jUJ79KH4TkAKDTpV6IRHTs6a8hEmMDeocJL9MEAsLgGzOjCFdvNXJ7G6MkZsq1hgVzUCyDrgALW96FeZKkqScwRA=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEj6ikz3PkisS3OLgpC7RPPyGvnovlut_-z3Yp5iuYD5xwhhJIXj76nlxr6dV-jSeqX7iKf0nxOZpM-AqykFQBCH42QPKPVrqP97H9jUJ79KH4TkAKDTpV6IRHTs6a8hEmMDeocJL9MEAsLgGzOjCFdvNXJ7G6MkZsq1hgVzUCyDrgALW96FeZKkqScwRA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">換上喜氣洋洋的紅色電容</div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div>再來是原來需要更換的音量。主人告訴我這個音量除了旋鈕太過突出之外,只要轉一點點就會非常大聲。我拆下之後,才發現這個音量是500kB的,更糟的是我還用Shunt接法,在前面串了500k的電阻,不只轉一點點就很大聲,而且會衰減高音,所以本來就請他準備100kA的音量來裝。但是!RK27的尺寸會卡到電路板,根本無法安裝......還好我手邊有一些庫存的音量,從裡面找到一個日製50kA的16型,跟主人說明後,安裝上去了。<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiP4k15OKpv_sVNMKZYosnUXVCuto_i3ce9pH85l-3Xm11v2CDsiV5w3ZRfX64i2LlAusU-O9euGjrIhW7LryqAqn8BCos0fR8RAS8XR-czFqbCTzEMFhOHq82sDTLBaVc1H2OH1AhJ4WX1WGmAGUCUDb7saXPziaAOmBbQdQ-t1LtnAjXqCCyRfxEtqA=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1060" data-original-width="1600" height="212" src="https://blogger.googleusercontent.com/img/a/AVvXsEiP4k15OKpv_sVNMKZYosnUXVCuto_i3ce9pH85l-3Xm11v2CDsiV5w3ZRfX64i2LlAusU-O9euGjrIhW7LryqAqn8BCos0fR8RAS8XR-czFqbCTzEMFhOHq82sDTLBaVc1H2OH1AhJ4WX1WGmAGUCUDb7saXPziaAOmBbQdQ-t1LtnAjXqCCyRfxEtqA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">換上了50kA的音量</div><div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div>旋鈕的部分,友人有購買了一些跟原機大小一樣的旋鈕,就一起把他們換裝上機。</div><div>然後不裝管子,先插電,確定沒有火花之類的意外,再插上管子,加上假負載,上電,量一下各點電壓,跟電路圖上的接近,就放心可以聽歌了。試了Phono以及CD兩個輸入,沒有甚麼雜音,音量調整也很順暢,不會突然很大聲,切換波段與平衡也不會有雜音。Wurth的電容聲音也不差,有厚度的溫暖,看來這牌子以後也可以放心地使用了。</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEj4Uqc76ecfbRCeo_iFIy_zu8k4cCXS1nmRPesyr0kjiydZoHRpOCpcfyTRgOsIKBoSBsqG7qCJ0zb2X352f5kXjPC0ev726vMwDaNY3LLxRBARvihNrpLXtvtv3Q_cy52egwmE45Qin9pdjrNN7gebv0buQAoJrTp2DOls1E0A_blaR_dxntHclY6enA=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="964" data-original-width="1600" height="193" src="https://blogger.googleusercontent.com/img/a/AVvXsEj4Uqc76ecfbRCeo_iFIy_zu8k4cCXS1nmRPesyr0kjiydZoHRpOCpcfyTRgOsIKBoSBsqG7qCJ0zb2X352f5kXjPC0ev726vMwDaNY3LLxRBARvihNrpLXtvtv3Q_cy52egwmE45Qin9pdjrNN7gebv0buQAoJrTp2DOls1E0A_blaR_dxntHclY6enA=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">完成了熱熱的真空管機</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhKAO3ZE6lmOlRZznnKunAJn7XMY81vUIGkr2Ap86U0IKXgNCUtEilEr4SbKNOqQVnK2pAmB6OA6eEEtkznQUicxWMPgr_X14jaeoj_fhvvpfS-tvq-Mu3bMlrjrX6_Xd8zJrK_1lX5fJpJ1hHUX8BdWB8XwhlVylDqVvnuRyNeyu1hAoyDRul89XK_JQ=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1132" data-original-width="1600" height="226" src="https://blogger.googleusercontent.com/img/a/AVvXsEhKAO3ZE6lmOlRZznnKunAJn7XMY81vUIGkr2Ap86U0IKXgNCUtEilEr4SbKNOqQVnK2pAmB6OA6eEEtkznQUicxWMPgr_X14jaeoj_fhvvpfS-tvq-Mu3bMlrjrX6_Xd8zJrK_1lX5fJpJ1hHUX8BdWB8XwhlVylDqVvnuRyNeyu1hAoyDRul89XK_JQ=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">靠右邊的兩隻5751是唱頭放大用</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgV25YHXft6UY77dim-xXxLNECOMRp4683xXA9dagBbFkLiaUGmxwixK3bNrnknvvHYyEFpl6M09mGMWAtZM2qbkqEyWcF5z5ZNSkXe2XHxp-M4GA1HQFATdFw6pL_HgamXlmN6fwfsNY1ME1REaECybE9QlIoSyJkpfZdaL3-TGXeSZM-GbFNkNyAcow=s1600" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1093" data-original-width="1600" height="219" src="https://blogger.googleusercontent.com/img/a/AVvXsEgV25YHXft6UY77dim-xXxLNECOMRp4683xXA9dagBbFkLiaUGmxwixK3bNrnknvvHYyEFpl6M09mGMWAtZM2qbkqEyWcF5z5ZNSkXe2XHxp-M4GA1HQFATdFw6pL_HgamXlmN6fwfsNY1ME1REaECybE9QlIoSyJkpfZdaL3-TGXeSZM-GbFNkNyAcow=s320" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">中間的12AX7與另兩支6DJ8是後級驅動級</div></div>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-90710803796987643882021-04-08T14:45:00.000+08:002021-04-08T14:45:21.474+08:00Accuphase E407 改電壓老同學要搬家了,他手上很多器材需要逐一檢視,看是要出售還是帶去新家。他有一部Accuphase的綜合擴大機E-407,是從日本找人當馱獸直接拉回來的,當年他並沒有更改電壓,是直接買了一個堅新的隔變供應100VAC,就這樣聽到他出國工作後閒置。最近他打包時,想要把它改成台灣可以直接使用的狀態,上網查了之後是看到似乎可以改,但是沒有詳細的資料,所以約我過去他們家瞧瞧。<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinD0IiZwETCiDtiKVy0PguWy5uFp-rhPlB0ANG2e0xgBqlfdPKx1vMXhhCOwbriiBai4wJDW6CaNvSPWENgcHkXY0I5gOKg6rnSO9darEzAP-ByQkJs0tzvJ9F4ltgvdFk3mZBfMjrxSvv/s2048/IMG-6661.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinD0IiZwETCiDtiKVy0PguWy5uFp-rhPlB0ANG2e0xgBqlfdPKx1vMXhhCOwbriiBai4wJDW6CaNvSPWENgcHkXY0I5gOKg6rnSO9darEzAP-ByQkJs0tzvJ9F4ltgvdFk3mZBfMjrxSvv/s320/IMG-6661.JPG" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">這就是名機本機</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">它其實算是好拆,先拆掉兩邊的護板,就可以拆起上蓋,翻面就可以拆下蓋。只是因為機器很重,在翻面的時候要小心不要傷到了機器與人類。</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLPgNFrzaPG876reBy3EBuStftV_aiM-ocAjKiy2J24cB58HgNk0kbkzJONKCyqRB01DImmzsAWqp9MC2XMWR_lft-6kgzJTciGln_3aC4_NgAfPLQJVkcba_wL4KqwLV9o9TNnmK8FSzB/s2048/IMG-6656.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="1536" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLPgNFrzaPG876reBy3EBuStftV_aiM-ocAjKiy2J24cB58HgNk0kbkzJONKCyqRB01DImmzsAWqp9MC2XMWR_lft-6kgzJTciGln_3aC4_NgAfPLQJVkcba_wL4KqwLV9o9TNnmK8FSzB/s320/IMG-6656.JPG" /></a></div><br /><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">上板拆開,很清楚可以看到經典的Accuphase設計與佈局。個頭巨大的變壓器外殼上,標示著初級與次級抽頭對應的色碼,不過並沒有詳明它們的電壓。</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIQE5bNlnNFZrEidyeE2XWS0DcwG-Jtvw5cCppgXFgc095D45wfZYAEoYxFQD7RfgBek1fv4ezHnpBJSRSYUVfbEbB4PGq4753BRLxEeui5dkkNrXWLf-dKJ47NrRsnoXYCUJ1Yu7Hx3l0/s2048/IMG-6657-web.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIQE5bNlnNFZrEidyeE2XWS0DcwG-Jtvw5cCppgXFgc095D45wfZYAEoYxFQD7RfgBek1fv4ezHnpBJSRSYUVfbEbB4PGq4753BRLxEeui5dkkNrXWLf-dKJ47NrRsnoXYCUJ1Yu7Hx3l0/s320/IMG-6657-web.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">翻到底面,可以看到AC輸入(棕線與白線)經過開關與繼電器之後,接到一組接線端子上,而另一端則是接到變壓器的次級。而輸入AC的選擇可以透過底下那張表格的說明,更換不同顏色的次級到所對應的端子上,以符合用家在不同電壓地區的需要。</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheKC9lnw1TkKn1BRyo09y3XXkXFTYdG0EQD3zuVNiykekpy6bUpx7KzBWeuOPpodr3hggi9ExjXBjktZ2vAql4NfBm1xpWufOELBqoYP85he0Zgp1LciCtxJjpcQ9RCQ6asg09FyDYD2mt/s2048/IMG-6660-web.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheKC9lnw1TkKn1BRyo09y3XXkXFTYdG0EQD3zuVNiykekpy6bUpx7KzBWeuOPpodr3hggi9ExjXBjktZ2vAql4NfBm1xpWufOELBqoYP85he0Zgp1LciCtxJjpcQ9RCQ6asg09FyDYD2mt/s320/IMG-6660-web.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">上面就是重新接線成110VAC輸入電壓的樣子,可以比對一下跟剛剛還沒重接的差異。我是覺得Accuphase在這種小地方也都很用心,看得懂表格就可以自己更換電壓,整個過程只要用到十字起子(拆側板跟上下蓋),尖嘴鉗(拔插變壓器次級的壓接端子)跟毯子就夠了,方便。</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">Accu接起來聽還是蠻好聽的,外觀看起來也是有著日本人的細緻與不苟,能讓它直接吃市電真的是太好了。不管同學是要留著還是出讓,這部機器應該還可以開心地繼續唱歌。</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhtM_4M4wD89SyYNUP3ugnnvJVCnFmJpCJV8o4nVgWntTsYjI_MMk4139jhMB9SUGIgX_JmKRHKUejvbK7UUjiETBseV0a6R2SsjJAWkIvxy_r2aPEsZf3lpsFTvWgXRRHYVzWgRtN3zmZa/s2048/IMG-6662.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhtM_4M4wD89SyYNUP3ugnnvJVCnFmJpCJV8o4nVgWntTsYjI_MMk4139jhMB9SUGIgX_JmKRHKUejvbK7UUjiETBseV0a6R2SsjJAWkIvxy_r2aPEsZf3lpsFTvWgXRRHYVzWgRtN3zmZa/s320/IMG-6662.JPG" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: left;">這是我好久以前幫他組的CD-PRO2,相較Accuphase而言就真的一整個DZ的土炮感啊哈哈哈。</div>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-66966696605535505132021-01-17T17:44:00.000+08:002021-01-17T17:44:30.855+08:00Pearl 2 唱頭放大 Pt.1<p> 我曾經在2004年製作過PASSDIY的唱頭放大線路<a href="http://diycoffin.blogspot.com/2008/03/pearl-phono-stage.html">Pearl</a>,這個線路很穩定,自然耐聽,目前也剛好裝在系統上。Pearl的設計者Wayne Colburn在2010又發表了另一篇文章<a href="https://www.passdiy.com/project/preamplifiers/pearl-2">Pearl 2</a>,這些年也經過許多的網友實作,聲音跟可靠性仍然受到肯定。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiS9VxloqmjhlH6XjcZ2gzJ3buBt0-XTSG6Gx6hF8g_xybDFUms1KzG7m4z6HJent4FqrsLEq-p_-4YLdQ4Y0-IevoHZJ66Kt76uiz3vwlVTTl93N3KZIz9kUNiEAIpHzkcBAa-qnpsAJ2e/s914/sch01.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="587" data-original-width="914" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiS9VxloqmjhlH6XjcZ2gzJ3buBt0-XTSG6Gx6hF8g_xybDFUms1KzG7m4z6HJent4FqrsLEq-p_-4YLdQ4Y0-IevoHZJ66Kt76uiz3vwlVTTl93N3KZIz9kUNiEAIpHzkcBAa-qnpsAJ2e/s320/sch01.JPG" width="320" /></a></div><br /><p>Pearl 2的基本架構,跟Pearl還有PASS ONO都共享相同的血統,第一級使用四個JFet並聯,共源極放大,上面有BJT串疊,輸出給RC構成的RIAA網路做濾波。第二級就各有千秋,這次Pearl 2輸出到有電流源的JFet的差動對,再以恆流供應的P-MosFet共源放大輸出。所以比較要注意的,就是這第二級是正相輸出,加上第一級是反相,所以整個電路的輸出是反相的,關於這點,作者是說你可以反接唱頭蓋的接線,或是喇叭反接。那當然也可以在電路上加上反相的東東,或許才是最好的辦法?</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh14k8vOb6F5aMWq0OA0K3yQDSoZLpurxPbak9ORNOPYvGuLZq-vpCNCYB-r3P0ubYr_BB7imQVuavRL1tgvtYizNzKvu2OMkqy9i1vlK2QA8mlsL40kfGkHdxOny1xmvoN_rKnYxPgTyyz/s2530/Pearl_II_SCH_simplified.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1243" data-original-width="2530" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh14k8vOb6F5aMWq0OA0K3yQDSoZLpurxPbak9ORNOPYvGuLZq-vpCNCYB-r3P0ubYr_BB7imQVuavRL1tgvtYizNzKvu2OMkqy9i1vlK2QA8mlsL40kfGkHdxOny1xmvoN_rKnYxPgTyyz/s320/Pearl_II_SCH_simplified.jpg" width="320" /></a></div><br /><p>但是經過了10年,一個不一樣的環境年代,沒有甚麼事比要找到適合的JFets更麻煩的事情了。這個線路需要2SK370這個小訊號JFet,也可以使用2SK170/LSK170,但是目前都非常難找,市場上流竄著非常多的假貨,目前所知能夠信賴的,只有露天上的davidaudio,要不然就要直接跟Toshiba或是Linear Systems一次買一大堆來分銷,這個是沒辦法的事。還好我還有2000年左右買的一些些,但是可能也配不出對了,但至少可以讓電路工作,要惜福啊。</p><p>電源部分,電路需要+/-24V的供應電壓,原作使用7824/7924,其實78/79系列是蠻好的穩壓IC,以前傻傻的常用317/337去取代他們,事實上如果用不好,317/337會比它們還要吵,而且78/79使用起來真的非常便利,不要瞧不起他們喔哈哈。</p><p>回到放大電路上,第一級的2SK370,到底要挑多少IDss的呢?(講的好像很好買很好挑似的)首先要注意的,是上面的串疊NPN BJT,他的工作電壓已經由周邊的零件決定了,B極大約是10V,那要確保它可以正常動作,他的C極就不要小於10V,也就是說上面的負載電阻499R,跨壓也差不多在10V左右,工作電流在20mA。這20mA分配給四個2SK370,一個大約5mA,而原電路的源極電阻10R其實很小,所以IDss不能找太大的,最好是5-6mA左右,以2SK170來說,GR級可能比較適合。但是以原電路的源極電阻10R,來計算這一級的增益,會得到4*[499/(10+(1/gm))]=40倍,第二級又是100倍,整體的gain變成400倍.....有點恐怖會不會?但若是使用Pearl電路的設定,也就是22R的源極電阻,第一級增益就可以降到30,而且有可能可以用IDss稍微大一點的2SK370。總之可以調整源極電阻,來適用手上的JFet,也可以微調串疊BJT的工作點,讓他可以正常工作。這就是Diyer的自由度啊,因限制而產生的自由度......</p><p>最後講到反相的問題,只能透過外加電路來實現,最簡單的就是用一個OP來做inverting amp,這個應該不難,但是如果可以找到一個用離散元件做的就更好了。另外一個比較直觀的方式,就是加一個音頻變壓器,很容易就有反相訊號可用,只是鐵芯元件價格不斐,並且要做好適當的隔離。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHQ4nvTKQBuKi2A_REnftMDqDJ6rfgwgfoO7eHvueeCRTr3ffNnS9udjqEQWkNoqXzqcgQUFYnQAB62FMvRNWJq5RzTjmHQvs5MV6X-w3tteQiI2Q-T6Hei-kvRqSHhJt8aiORPEHzFVvy/s2048/Pearl_II_Silk_simplified.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1037" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHQ4nvTKQBuKi2A_REnftMDqDJ6rfgwgfoO7eHvueeCRTr3ffNnS9udjqEQWkNoqXzqcgQUFYnQAB62FMvRNWJq5RzTjmHQvs5MV6X-w3tteQiI2Q-T6Hei-kvRqSHhJt8aiORPEHzFVvy/s320/Pearl_II_Silk_simplified.jpg" width="320" /></a></div><br /><p><br /></p><p>其實我幾年前就有想要搞一下這個,不過手頭上本來就有唱放,加上人有了年紀跟有了貓咪就懶得去東搞西搞,拖到現在。設計上,只打算保留放大線路,電源的部分拿掉,這樣比較有可以亂搞的空間,所以就想辦法參考了網路上的一些照片跟資料,用EASYPCB自行搞了一個layout出來,也不知道行不行,就等著實作了。</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP-NDXsbY-6-bBATs3-NmohmPJwDsdrSZmGLXqa8rZcwhaT94quY89Wd1V0rmpIrKyA-ELGkQeM2L4ptWLOWy0LEbihbIcx8mZJm6uTtkRPJqI9VXyeTttwo1cn42eb-4yVRd4WZiRGI7v/s2048/PCB20210117.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1071" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP-NDXsbY-6-bBATs3-NmohmPJwDsdrSZmGLXqa8rZcwhaT94quY89Wd1V0rmpIrKyA-ELGkQeM2L4ptWLOWy0LEbihbIcx8mZJm6uTtkRPJqI9VXyeTttwo1cn42eb-4yVRd4WZiRGI7v/s320/PCB20210117.jpg" width="320" /></a></div><br /><p><br /></p>DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com1tag:blogger.com,1999:blog-8728071242293079417.post-5037319843179397912015-03-29T22:19:00.000+08:002015-04-02T00:44:45.954+08:00Lend a helping hand....最近幫朋友維修整理了幾個器材。<br />
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第一個是Audio Innovations Series 800CD 前級,主人說它不會發聲,而且曾經幫它換過漏漿的電容器,但是沒用。總之就先打開來看看.....<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJChrGAgrmI_TEH_7862zTWiJBoQSYSPxvuLtIXG-yppXeSgd7gEcEhyphenhyphenD4dKGL9oVJgOfksf6ouEpekdcdYnfNJiKdSoKVxtHWDxVf4zBehbQreu4oSNS4YvdQ5JXjDfiOwzcP5OQSGrU5/s1600/top.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJChrGAgrmI_TEH_7862zTWiJBoQSYSPxvuLtIXG-yppXeSgd7gEcEhyphenhyphenD4dKGL9oVJgOfksf6ouEpekdcdYnfNJiKdSoKVxtHWDxVf4zBehbQreu4oSNS4YvdQ5JXjDfiOwzcP5OQSGrU5/s1600/top.jpg" height="200" width="320" /></a></div>
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看起來並不複雜,我檢查了接線,也沒有鏽蝕斷裂,那就插個6922,上電試試看吧。哈哈,燈絲不會亮,量一下燈絲的電壓只剩下1.X伏特,那應該是燈絲穩壓那邊出問題了。把電路板翻過來,trace一下線路。主放大就是一枝6922或6DJ8共陰極放大,電容交連輸出,極為簡單;高壓跟低壓都是晶體穩壓,其中燈絲的部分是利用一個7.5V的基納當成TIP3055的基極參考電壓。反覆量測的結果,確定是TIP3055壞了,於是再去電子零件行找了一個。<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYbjt6QDqWJey7_yV1bvOEQ5LU5VJaeDrrE7TIWARhMQGlwAGFTCqVGnml1Q4YRNlFuLaHpbCR7kxyi6zSu3JfEkjDThzNwG8yosbFDVfOpc0iRJCLEvTG1duvtLU0cUROFC7dULLeNcAG/s1600/3055-DEAD.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYbjt6QDqWJey7_yV1bvOEQ5LU5VJaeDrrE7TIWARhMQGlwAGFTCqVGnml1Q4YRNlFuLaHpbCR7kxyi6zSu3JfEkjDThzNwG8yosbFDVfOpc0iRJCLEvTG1duvtLU0cUROFC7dULLeNcAG/s1600/3055-DEAD.jpg" height="240" width="320" /></a></div>
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這顆就是壞掉的3055。<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_XcdX6PrqGuI_jlTB9jL1DOzDEYzOt4CgKNRtPi2fK0WH6oZguv8dDZi4lSaxbmye3sTdaRksqqEl-zD6bylxa-pJouneEsM-r9r1dY4dnODmlNRYy2ThIOyZoUBP1nfwv_fB_7C1KSkc/s1600/3055-replace.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_XcdX6PrqGuI_jlTB9jL1DOzDEYzOt4CgKNRtPi2fK0WH6oZguv8dDZi4lSaxbmye3sTdaRksqqEl-zD6bylxa-pJouneEsM-r9r1dY4dnODmlNRYy2ThIOyZoUBP1nfwv_fB_7C1KSkc/s1600/3055-replace.jpg" height="228" width="320" /></a></div>
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電子材料行買到的。<br />
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焊上去固定之後,上電,看到管子緩緩亮起,覺得應該OK了,可是過了一下,發現管子比我之前的印象還要更亮,於是再去量了燈絲電壓,發現電壓居然快7V,於是趕快下電。再次看晶體的規格書,咦,沒錯啊,Vbe應該是1.2V左右啊,會不會又是remark的受害者?解決之道,就是在功率晶體的射極輸出串上一個2R的電阻,可望把燈絲降到6.3V左右。再次上電,量測燈絲,沒錯了,大約在6.3-6.4V間,安全範圍。<br />
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完成的上視圖。<br />
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音量用已經絕版的Alps Black Beauty。<br />
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零件也都是一時之選。<br />
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再來是一部綜合擴大機,NVA AP35。<br />
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這部機器拆開之後,內部結構非常有趣,除了放大電路有PCB之外,其他一律用單芯線搭棚,這是我從來沒在晶體機上看過的。<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAyi4tY5BZCuICZgVi-PrNgYVnwz1GdLoM3x8X34NuwRTHQTXb9rSAooArQGu6lIMXH7F41Q4DTMS58QDfERzbqlgM32Rf-ON2iKTuSoWL-OvGkISF1av9CAAafU7qzcFE31iM1fyEuk7Z/s1600/top.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAyi4tY5BZCuICZgVi-PrNgYVnwz1GdLoM3x8X34NuwRTHQTXb9rSAooArQGu6lIMXH7F41Q4DTMS58QDfERzbqlgM32Rf-ON2iKTuSoWL-OvGkISF1av9CAAafU7qzcFE31iM1fyEuk7Z/s1600/top.jpg" height="233" width="320" /></a></div>
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大電流就走2mm的,訊號就是0.5mm,濾波電容還有並聯PP電容,算是很特異的一部機器,會有一點令我聯想到另一家廠商,47labs。<br />
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總之,這部機器本身是正常的,唯一不正常的,只有那一顆音量開關。我記得在這部機器上市之後,這顆音量一直有狀況,甚至連音響評論裡面都曾經提起過,主人也是為這個問題苦惱,所以,就把它給換了吧。<br />
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這顆就是惡名昭彰的NVA音量,是Spectrol做的Cermet(瓷金)材質音量。有時一個聲道會沒有聲音。不過據說聲音非常透明。<br />
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換上去的音量也不遑多讓,是Bourns的導電塑膠音量,先前我在其他前級上用過,聲音也很透,有潤,細緻。<br />
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第三件比較有趣,是一對喇叭,而且還是一對算是有分量的喇叭.....<br />
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Harbeth的HL MK4,主人也不知道它多少年了,是在年輕的時候買二手進來的,最近才有拿出來,想說先抱來測測看。接上系統,開聲,嗯.......好像市用電話裡發出的聲音,沒有高頻。把耳朵靠近高音單體,它還是有在唱歌,只是跟低音單體的效率差了很多。我第一個想法是分音器裡的電解電容報銷了,於是請主人留下來讓我檢查一下。<br />
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把背板拆開,看到內部。<br />
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高音跟低音單體都是Audax的,分音器裡沒有一顆電解電容,所以我的猜測不通。那只剩下高音單體壞掉了,可是這麼巧,兩邊壞一樣?<br />
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中低音是8吋Audax PP盆單體,這在當時算是非常新的技術。<br />
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高音也是Audax軟膜單體,但不是蠶絲那種。<br />
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這是分音器,裡面真的沒有電解電容。<br />
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因為沒有任何Harbeth的知識,所以趕快上網查了一下,發現了一個Harbeth官方成立的討論區,似乎也有其他人有碰到相同的狀況。解決之道,就是去買替代的單體,有一個廠商請Audax生產外形一模一樣的單體,據說可以無痛替換。得到主人首肯,就下單買了一對回來。<br />
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收到打開,真的長相與尺寸跟原來的一模一樣。<br />
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在討論區中,管理員有交待,要替換之前,需要注意單體的極性,另外又有其他網友建議了一個叫做Freqeunsee的小程式,只要搭配Pink Noise,就可以看出大致的頻譜。於是我都準備好之後,先用舊的單體組合來測試。<br />
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可以看到,從2K左右就開始衰減,一直到5K之後才慢慢又回升,難怪像是電話聲。<br />
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然後我裝上新的單體,先用鱷魚夾夾住單體與分音器出線,紅對紅,黑對黑,再跑一次Pink noise。<br />
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很明顯看到,4K-20K的高頻都補起來了,可是3K左右有個大凹陷。這是因為分音器修正頻響時已經將相位反轉,所以必須要倒過來接,才不會跟低音的部分抵消。<br />
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這樣接了以後,頻響就已經非常平坦了。10K以上有多一些,應該是新舊單體間,仍然有著時代的差距吧。<br />
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拆下來的高音,算功成身退了。不知道它是不是裡面原來有磁液,乾掉了才會失衡。<br />
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試聽的感覺,高音的確偏多了一點,但整體還是很順,無論人聲器樂或是電子音樂表達的都相當好。<br />
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那個時代英國生產的東西,就是很雋永,木皮也選得非常好看,每對喇叭也都有配對,是非常用心想把好東西送到顧客手裡,讓他用上個二三十年吧。<br />
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後來又根據Harbeth討論區網友的建議,在高音單體上加上Pad網路,適當衰減高音的效率,再試聽的結果,聲音平衡了,中低音回到他該有的份量了。讚。<br />
<br />DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com5tag:blogger.com,1999:blog-8728071242293079417.post-81410953580260554812014-10-16T22:03:00.001+08:002014-11-27T12:17:14.824+08:006ж52п直交6П36С單端五極管作單端,之前只有幫朋友做過6P3P/6L6,印象還不差。最近發現了一支蘇聯的五極管<a href="http://www.radiomuseum.org/tubes/tube_6p36s.html">6П36С/6P36S</a>,等同於歐美的EL500,在三極接法的操作下有著不錯的線性,功率有機會到4W,所以就在網路上便宜地買了幾隻二手管,回來玩弄一下。<br />
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看它的曲線,工作點可以選在-35V/75mA,所以第一級電壓的放大倍率只要在40以上,應該都可以用。那何不極端一點,也用Pentode接成Triode呢?而且,一樣也用蘇聯的小管。其實蘇聯做了不少性能不壞的小信號五極管,在另一陣搜尋之後,發現這隻6ж52п/6Z52P,放大倍率有差不多70左右,屏阻不到2K,非常適合用在這裡。</div>
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電路圖如上圖所示,基本上就是直交架構,6Z52P的負載屏阻8K,偏流17mA,直接交連到6P36S的柵極;6P36S的陰極電阻2K,流過75mA,約150V。電源用5AR4,讓高壓電緩升,並且墊高6P36S的燈絲電壓。</div>
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於是開始收集材料,變壓器,電阻,電容.........之前還存留著的DZ木筐,就拿來裝吧,鋁板也裁了,就依照大小,把孔位給規劃一番~</div>
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以DIY來說,做電路不難,但是鑽孔最累人了,好想養一部CNC機器在家~</div>
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把鐵芯,管座,接線架,開關等等的,一個蘿蔔一個坑。</div>
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然後依照rule of thumb,依序配線,焊零件,整理。電源部先整個弄好。</div>
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然後再完成功率部,電壓放大部,零件很少,很快就可以完成。</div>
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裝上木筐,來個沙龍照吧。</div>
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這就是戴屏帽的6P36S。EL500管身比較細一點。</div>
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發聲中。</div>
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單端管機最重要的零件,當然是輸出變壓器了。我的OPT跟電源變壓器,都是跟<a href="http://blog.xuite.net/look_t/twblog">Look-T羅大</a>定製的;濾波電感是<a href="http://blog.xuite.net/chenken168/blog1">小陳</a>的,這兩位都是我所尊敬,對鐵芯元件有著深入見解的前輩,而他們的鐵芯,效果都非常好,讓我覺得不必花大錢去追求高價或稀有的神器。除了大功率電阻需要特別去購買外,其他零件大概就是抓庫存出來用。</div>
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上電之後,量測工作點,高壓比我用<a href="http://www.duncanamps.com/psud2/">PSUDII</a>所算出來的要低了些,是在AC輸出的部份就略降了,應該是我開規格的時候沒有留足夠的餘裕,所以因為變壓器內阻所產生的壓降。從示波器看來,最大不失真(眼睛看)功率大約在2.8W左右,跟原來推算的三點多瓦有些距離。不過,畢竟還是要以耳朵聽才算數,而且就我的經驗,1W輸出已經相當大聲了,當然我沒說一千微瓦一定推的好。</div>
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開聲!第一個感覺是控制力很好,而且聲音算是很飽滿,以我的經驗來說,第一級給予大電流功不可沒,整體比較緊是一定的,因為變壓器很不好Run開,需要時間。中高音比較突出,就這點我有去請教羅大關於輸出變壓器的頻響,羅老師也在他的blog上開示了,大家有空可以去看看。其實是我太急了,應該要讓機器再跑一跑,果然,現在中高音的火熱感有降低一些,隨著時日應該會更滑順。它跟300B單端來作比較的話,當然是比不上那種寬鬆大度的聲音,但是話說蘇聯管就是有一種驚人的速度感跟控制力,還有一種說不上來的硬朗,好比像聽小提琴的擦弦,就會是直接利落而多於柔美,有一種不矯柔做作的真實感。</div>
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期待它慢慢穩定,少一點點火氣,應該會是非常好聽的小單端。<br />
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DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com5tag:blogger.com,1999:blog-8728071242293079417.post-54993084083474174252014-08-13T14:13:00.000+08:002014-08-13T14:16:32.306+08:00代裝 6N1-6P3P 單端真空管後級有網友看到小弟之前裝的<a href="http://diycoffin.blogspot.tw/2013/08/6n1p-6p3p6l6.html">胡桃木版6N1-6P3P後級</a>,覺得很心動,也要我幫他裝一部起來。<br />
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過程是差不多的,重要零件也都沿用之前的設定,像是ROE高壓電容,RIFA陰極電容,Draloric陰極電阻,交直流電阻,Dale低溫度係數電阻,大紅袍電阻等等。<br />
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組裝測試完成。正面。<br />
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側45度。<br />
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45度俯瞰。<br />
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頂視。<br />
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背面。<br />
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無限歡唱中。<br />
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我有多做幾片胡桃木側板跟旋鈕,有興趣要作胡桃木版的朋友,也可以跟我連絡。DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com2tag:blogger.com,1999:blog-8728071242293079417.post-19303713731047740452014-08-10T16:27:00.000+08:002014-08-13T14:15:46.796+08:00代裝DC B-1Nelson Pass大師的B-1,經diyaudio的齊心討論,變成了直交的<a href="http://diycoffin.blogspot.tw/2010/12/buffer.html">DC B-1</a>。有個網友購買了套件,請我幫他代裝。<br />
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拿到機箱之後,先開孔。還好背板已經先請賣家代開了,要不然很累。</div>
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DC B1已焊好的模組本人。</div>
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還沒清潔過的焊面。</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvdEyDz91GVV1pMoJw274kII5fAPA6Y51sfz4SunZMQqw8as-LPD2Wn2Q7wkc4juFToQW4F0u1ucqJdzpKXb7xjZv9kCmjpaLO4Zqjh_V6bQhEW1EcKjyhzHVOmz8Zcm9WwFzzsM2zkiQp/s1600/unwash.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvdEyDz91GVV1pMoJw274kII5fAPA6Y51sfz4SunZMQqw8as-LPD2Wn2Q7wkc4juFToQW4F0u1ucqJdzpKXb7xjZv9kCmjpaLO4Zqjh_V6bQhEW1EcKjyhzHVOmz8Zcm9WwFzzsM2zkiQp/s1600/unwash.jpg" height="187" width="320" /></a></div>
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用水洗銲錫(Water Soluble),焊渣用清水加牙刷就可以清得一乾二淨。</div>
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裝箱完成的上空照。</div>
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正面照。</div>
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前級加上級進音量。</div>
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輸入用繼電器,因為懶得搭棚,就用現成可買到的PCB來作。</div>
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輸入選擇,沒有PCB所以這邊比較煩人。</div>
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工作中。</div>
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DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-82037437277300795592014-05-26T21:52:00.000+08:002014-08-10T16:30:33.410+08:00LUXMAN LXA-OT3 小型擴大機 穿衣記<div class="separator" style="clear: both; text-align: center;">
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之前幫朋友規劃了一個<a href="http://diycoffin.blogspot.tw/2013/10/w.html">原木結構的Phono</a>,剛好被主持<a href="https://www.facebook.com/LittleSound">Little Sound</a>的友人看到,他就問我有沒有興趣幫一個他團購的小擴大機做機殼規劃。仔細看了一下,才知道這部叫做<a href="http://cafe-hiyoko.blog.ocn.ne.jp/blog/2014/01/stereolxaot3_cd.html">LXA-OT3</a>的半成品擴大機,是鼎鼎大名的Luxman設計製作的,搭配著<a href="http://www.ongakunotomo.co.jp/magazine/stereo/news.php">日本Stereo雜誌</a>2014年1月號販售。在日本甚至世界其他地方,都激起非常多樂迷收藏的念頭。當然,因為是半成品,所以只有基板,角柱,加一個<a href="http://jijikazunn.mo-blog.jp/webblog/images/2013/11/05/furoku_2.jpg">薄似檔案夾的透明外殼</a>。<br />
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承蒙Little Sound主人給我一部LXA-OT3,我開始思考要如何組合跟設計。它原來販售的目標可能就是3C一族,所以我依然打算用原木來作為他的新衣,讓電腦桌多一點自然樸實的氣氛,畢竟木質的溫潤感跟質感是無法取代的。因為原雜誌裡都沒有任何基板的圖面,或是背板的開孔標示說明,所有尺寸都只好自己量。背板最麻煩,打樣了三次,才能够符合原機所有端子的大小。木盒依然找我的同學幫忙弄,在與鋁板試合的過程,也需要微調,還好木頭質軟,可以自己先修正,完成樣品的尺寸。<br />
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打樣完成後,在Little Sound寫了一些介紹。<br />
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"LXA-OT3的機箱想要有別於一般桌上型3C產品的金屬冰冷質感,一開始就以原木的外觀為思考起點,再配合適當配重的金屬底座,讓這部Luxman生產的小型擴大機Kit,變成每一部都獨一無二的手工HiEnd精品。<br />
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[原木]<br />
比較了很多種木材,選擇以胡桃木作為機殼。在這樣的尺寸上,10mm厚的胡桃木,強度跟密度可說非常足夠,而且材質溫潤,手感非常好。在工匠的細心處理之後,表面的花紋跟色澤都非常有著北歐傢具的氣質,加上四邊的圓角處理,為LXA-OT3帶來極富人文氣質的溫暖生命力。<br />
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[配重]<br />
為了與胡桃木的重量達成平衡,底座使用5mm厚度的鋁合金底板,讓LXA-OT3有個厚重的底座,有助於聲音的表現。底部固定孔位以CNC銑出皿頭倒角螺絲孔,整體完成度更高。<br />
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[觸感/視覺]<br />
除了胡桃木的溫潤,最常接觸的開關/音量旋鈕,特別定製44mm直徑的大型鋁合金旋鈕,旋轉起來手感極佳,並且染成淡金色,讓整體增添一抹古典的氣息。機箱正上的圓形LOGO設計,會以烙印的方式燒在機箱上,用手指觸摸之時,希望可以感受到我們以手工一個個打造的心意。"<br />
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等到團購結束,友人跟我說要作31個,還真不少。於是收到製作費之後,趕緊發包下定,這也才知道要作小量生產並不是容易的事情。一方面,木作的部份,因為是純手工,而且體積又很小,所以匠人必須一個一個費工裁切,組合固定,導角,打磨,上油......剛好又碰到連續一個月北部的多雨潮濕天氣,使得製作進度也大受影響。另一方面,鋁板的定製,反而又太小量,工廠都把這種小單放到機器有空閒的時候才作,也影響到整體的出貨時間。還有一些過於相信廠商的失誤,以至於旋鈕少了固定螺絲,只好趕快追加.....以後如果有機會再弄,有些準備工作以及必要的QC不能少。<br />
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以下把組合說明登載備份一下:<br />
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套件內容:胡桃木機盒,旋鈕,背板,底板,零件包<br />
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零件包內附:黑色圓頭自鎖螺絲X7,銀色皿頭自鎖螺絲X4,銀色皿頭M3螺絲X4,M3 20mm雙通銅柱X4,LED導光條X1,自黏腳墊X4<br />
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1. 將四個黃銅柱取代原套件內的四個銀色銅柱,然後將底版用四顆M3皿頭螺絲,與銅柱固定在一起,先不用鎖死,手緊即可。請留意底版的方向性,有沈頭的一面是機底,四個螺孔排列靠邊緣的是正面。<br />
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2. 將零件包內的LED導光條,有開3mm的一端,插在LXA-OT3的橘色LED上面。<br />
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3. 在機箱內部已經開好一個5.5mm的洞,剛好可以置入導光條。<br />
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4. 把固定好的模組跟木盒結合在一起,留意導光條,要剛剛好放進孔洞內。<br />
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5. 把背板合上去,先用三顆黑色圓頭自鎖螺絲,鎖進固定RCA/喇叭端子的螺孔。<br />
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6. 用四顆銀色皿頭自鎖螺絲,將底板與木盒固定。<br />
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7. 把剩下四顆黑色圓頭自鎖螺絲,固定背板的四個角。<br />
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8. 先把開關切到關的位置,然後把旋鈕套上,螺孔的方向對到音量軸削平的方向。小心調整旋鈕讓它離木盒差不多0.5mm的距離,然後用1.5mm的外六角扳手鎖緊。<br />
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9. 把自黏避震墊固定在底板上。<br />
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組合其實非常簡單,穿著新外衣的LXA-OT3,散發著很溫雅的氣質,至少我自己很喜歡。<br />
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雖然都是胡桃木,但是不同一塊木頭,彼此的花紋跟色澤,也都有差異。每個人手上的LXA-OT3,都是專屬的,獨一無二的LXA-OT3。<br />
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一些照片。</div>
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這個烙印的效果,我很喜歡。</div>
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如果有覺得需要保養的,匠人是建議用這個:</div>
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先用細的不織布打上一層,讓他吸收一下,再用乾淨的棉布拋掉多餘的油脂。或是亞麻仁油薄薄搽上亦可。或是常用手去把玩,自然而然就會有呼吸與光澤,跟傢具是一樣的。</div>
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Enjoy!</div>
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如果會用焊槍的朋友,也可以像我這樣,把LED直接延長,放入頂版的LED孔內。</div>
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DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-11039299267620978432014-05-26T18:55:00.003+08:002014-05-26T18:55:53.993+08:00AT4060麥克風電源--之四--加Pad以及其他上次<a href="http://diycoffin.blogspot.tw/2012/06/at4060.html">改裝好的電源</a>,因為有頭重腳輕的問題,所以又拿回來重裝了一次,總之就是把環形變壓器放到平底,其他板子很擠,但很勉強擺進去了。中間相安無事,有一次保險絲燒掉,換了一個slow blow 1A的進去,據說用了幾次又燒掉了.....應該是濾波電容的容值比較大,加上環形的啓動電流也比較高,所以才會連慢熔的保險絲也擋不住。查了一下,沒有其他莫名其妙的短路,就在AC電源輸入端串了一個NTC溫敏電阻,抑制湧浪電流,這樣就沒有再燒掉了。<div>
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後來錄音師給我FB Message,希望我幫他裝一個衰減器,因為拿AT-4060「基本上用來錄人聲沒問題,但是我們現在拿他來錄電吉他音箱....就有點容易破掉><」,他告訴我叫做這種衰減器叫做pad,於是快速查了一下有關麥克風Pad的資訊,找到<a href="http://www.uneeda-audio.com/pads/">這個網站</a>:</div>
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"A pad is nothing more than a network made of resistors that creates loss (attenuation) in a transmission line."</div>
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根據錄音師的要求,他希望是-20dB,也算是一般業界麥克風上pad的衰減值。所以根據上面那個網站的說明,很容易算出+/-端串聯的電阻是900R,並聯的是200R。我用了一個9P兩段的搖頭開關,切到0dB時可以把電阻網路全部斷開,-20dB時才接上。</div>
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錄音師終於在不下雨的空檔拿回去了。</div>
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「Pad Ok嗎」</div>
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「OK!」</div>
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Result.</div>
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順便拍了一下大頭照。</div>
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DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com1tag:blogger.com,1999:blog-8728071242293079417.post-89127289345259052262014-03-01T12:04:00.002+08:002014-03-05T14:47:30.874+08:00LCR Phono 真空管唱頭放大 Pt.4雖然聲音很好,但是這部LCR唱放,依然有著些微感應哼聲,以及工作點有可能不正常的問題。<br />
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先說第一個問題。這個電路架構,是第一級共陰極放大推動級間變壓器之後,經過RIAA網路的衰減,再進入第二級共陰直交第三級共陰,最後直交隨耦輸出。如此可以看到,第一級的EC8010,雖然放大倍率有50多倍,可是經過原來的15k:600級間變壓器之後,倍率變成只有十倍多一點,再經過等化網路衰減,等於回到原來的唱頭輸入電壓左右,假設以MM唱頭來說,第二級也是5mV的輸入,相對來說很低,跟第一級一樣容易受干擾。<br />
再者,<a href="http://diycoffin.blogspot.tw/2014/02/lcr-pt3.html">前文</a>說過,因為設計時忽略了考慮到微小訊號的特性,我把靜態電流提到很高,幾乎是一部小單端後級的電流量了,如此變壓器再怎麼屏蔽,都會影響到這個微小訊號,產生感應哼聲。<br />
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第一級增益的部分,可以用一個方法解決,就是更換級間變壓器。此時又反而拜小訊號之賜,第一級的負載交流電阻,不需要像一般設計前級後級時,取Rp三倍以上的阻值。所以,我大膽假設我可以用2:1的級間變壓器,以次級600 Ohm來說,初級會是2.4k;又因為EC8010是隻非常線性的管子,用2.4k為負載線畫在Ip-Vp曲線圖上,依然看起來有很漂亮的工作曲線。當然,以MM唱頭輸入訊號的高頻大約會是50mV~100mV來說,擺幅很小,不會有甚麼問題。<br />
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至於靜態電流,必須與第二個問題一起考慮進去,那就是工作點。<br />
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在測試當中,我先察覺哼聲的大小有時跟我插的E88CC管子有關。再仔細量取工作點電壓,發現當我使用二手管的時候,Ip不像新管那麼足,所以Vp會升高不少,這樣就直接影響到第三級的5687,有時直接變成正偏壓。而且,實測的工作點,即使是新管,也跟特性圖上的標示有出入,難怪5687的柵陰壓跟原來設計的差了一兩伏,而這一兩伏就足以將他從A類打入A2類......<br />
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所以新設計,我重新調整了工作電流,目標是低於50mA,並且將第三四級的柵陰負偏壓,都設計在-4V以上。出來的第二版,機內圖如下:<br />
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E88CC的部分,已經把實際新管的工作點考慮進去了。在TINA-TI上面模擬,也跟手算的工作點相差不遠。<br />
這電路圖也包含在MyAV裡面<a href="http://www.myav.com.tw/bbs/showthread.php?s=&threadid=20464120&perpage=10&pagenumber=5">GetPointLee前輩的建議</a>,把LED並上小電容,E88CC屏極也加上防震盪元件,特此感謝前輩的建言。<br />
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裡面的電阻值,很多不是標準E系列阻值,所以我都用並聯或是串聯來取得。這些電阻也都要消耗不小的功率,所以我一律都用5W的氧化膜電阻,便宜又好用。其實在台北,電子電路diy真是方便,有著各式各樣的電子材料行,也有唐竹或是佑昇這樣的發燒零件零售,無論是做實驗或是要打造昂貴的發燒材料電路,豐儉由人。<br />
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於是我就組合電阻阻值啊,拆啊,解焊啊,焊新電阻電容.....搞了半天,終於弄好主放大部分。然後把電源箱接上,上電,邊量工作點,邊調整穩壓輸出的電壓,以及並聯穩壓的偏壓電流。大致來說,跟我原來的設計與模擬相差不是太遠,但可能要去找兩邊工作電流/放大倍率一致的E88CC,會比較好,兩邊的工作點會比較平衡些。<br />
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聲音上有沒有差異呢?嗯,個性都沒有改變,但聲音的密度比較薄一點點,中音有退後以及減少一點點;但同時音場的透度有變高,細節多了一些,舞台變得比較深,最重要的是,哼聲原來在前級音量轉到9-10點鐘的時候,就已經接近我自己忍受的極限;現在要轉到12-1點,才跟原來的哼聲差不多大小,而且因為換了<a href="http://blog.xuite.net/chenken168/blog1/58300181">小陳的2:1級間</a>,整體的倍率又大概提高了2倍,volume不用開到太大,音量已經相當足夠了。所以,Result!<br />
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嗯....拿去別人家聽,直接用MM輸入時,開到很大聲時,哼聲依舊能聽到,看來必須再針對電源部分再做調整才成了。<br />
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DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com0tag:blogger.com,1999:blog-8728071242293079417.post-66655376363348202552014-02-18T21:04:00.000+08:002014-02-19T11:53:07.842+08:00LCR 真空管唱頭放大 Pt.3續<a href="http://diycoffin.blogspot.tw/2013/12/lcr-pt2.html">上文</a>....<br />
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原本想說要來測試頻率響應的,但是手上有的一部Creative E-MU 0404 USB,很不好搞,加上了反RIAA網路的唱放,硬是抓不到訊號,不然就是Overshoot,不知道是我操作不對還是....總之,只好略過測試;但基本上透過Tina-TI的模擬,知道應該雖不中亦不遠已。<br />
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所以,下一歩就是裝箱。在網路上找了兩個價格還算公道的箱子,是設計用來裝小後級的,尺寸還蠻剛好,重要的是材質--鐵箱,抵抗磁漏的能力比鋁箱要好。收到箱子以後,就轉入打孔OCD的症狀中,打了許多M3跟M4用的孔跟30mm金屬連接器的大孔....累......然後依序把手上的散件一一裝進去。<br />
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電源箱跟主機兩個在一起的樣子:<br />
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我先用環形變壓器,裝在鐵罩內灌epoxy,Choke-in的電感拿掉,但是電壓會變得很高,所以就先用一個150R的鋁殼電阻當Resistor-in,再加作一組Capacitor Multiplier降壓以及濾除AC連波。連接線大約40cm,連接器是30mm的金屬接頭,這樣電源跟主機可以並排在一起。都裝好了以後,蓋上鐵蓋,輸出接上示波器,測試.....沒有用........還是有幾十mV的漣波,當然長得跟原來不大一樣,可是還是在。嗯,只好再度加長連接線,到差不多一米,機器拉開,上電....唉,還是得這樣才行,但還是有10mV左右。<br />
這個版本,除了根據<a href="http://www.myav.com.tw/">MyAV<strike>常常當</strike></a>討論區中GetPointLee兄的建議之外,我把交聯電容換成了Gad-Viva的PP電容,上機試聽的結果,除了這個線路本身的特性之外,還蠻平庸的,音樂表情也不是很好。原來的UCC SPP電容,比它好上一大截,透明感極佳,質感也漂亮,只是偏白,有時太過Hi Fi。想到手上還有兩個M-cap Supreme PP,就立馬把它給換上去,只是箱內空間有點侷促,真是只能怪自己沒多留一點位置出來。<br />
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兩張空照圖:<br />
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M-Cap:<br />
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Siemens EC8010<br />
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換上M-cap的聲音,才真的讓這部機器,除了速度,定位,平衡感跟空氣感....之外,多了一個濃度跟韻味,以及音樂所需要帶來的情感。補品電容會貴,真的是有他的道理在。但是油浸銀箔真的太貴買不下手而且太大顆裝不進去Bye。<br />
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但是,主要的問題還是,我在設計之初過於樂觀,把每一級的電流都操很大,以至於這部Phono的電流消耗量,已經超過一部單端小後級所需了,所以造成了變壓器的感應磁場,怎樣都隔離不下來,尤其對於唱頭送出來的微小訊號來說,更是極大的干擾,同時,這顆環變的功率,也不大够應付這個需求,所以我只好再掏錢去定了一個大型的EI變壓器。所以如何降低消耗電流,這是一個可以想想,作為再次設計的方向。<br />
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又再一次觀察示波器的波形,發現除了有60Hz的干擾外,高頻仍舊有一些震盪,於是調整了接地的迴路,透過小電容把它給降低了一些。再來我在主機這裡,再加了一個100uF的高壓電容,這樣那些高頻的震盪才真的解除掉。我覺得Phono接地真的是個學問,尤其是像MC唱頭,訊號極為微小,與真空管線路的組合,是非常容易有哼聲的,所以像ARC PH3的設計以及PCB layout,真的很厲害,幾乎沒有任何哼聲。<br />
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另外一個需要思考的部份,就是直交線路,必須把很多工作點的要求想清楚,動一點就影響到全部,管子老一點就沒了負偏壓然後沒辦法工作,不太能像一般的機器隨便更換管子。這也是再次設計,必須注意的要項。<br />
<br />
但是回到聲音(先不論它依然有點可容忍的哼聲),這部機器,應該是目前我手上最好聽的一部。它速度快,直接,去除了負回授所產生的化妝效應,所以器樂的位置質感是自然的呈現出來,喜歡單端機的就應該知道我在說什麼;拜交連以及等化網路的鐵芯元件之賜,樂器的形體感還有音樂的連續性十分緊湊,有重量感跟濃度;真空管以及線路本身帶來的空氣感,讓音樂的活生感跟氣氛觸手可得;當然元件本身,EC8010真是個好聲的管子,活靈活現又有甜度,還有M-cap做最後的交連,也讓整體的音樂感跟色澤大大加分。<br />
<br />
我對LCR Phono的興趣大增,有空應該會繼續以這個架構來修改。Sweet。<br />
<br />DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com2tag:blogger.com,1999:blog-8728071242293079417.post-64157615210363982592014-01-31T13:57:00.002+08:002014-01-31T13:57:33.933+08:00中國人不只翻新,仿舊的技術也超強<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3vHgFUhPhrazTXXi5LX9s5difK859KHoP_LxdMTEyHepCZ7kiKDr8RFFSrLXBSBTGPzRsRfHqC6WviA1ph0GtQZcfNTXPUddRSJhaimfe04tRdSpKZlCILBANwf7zpsgh_XEw8fNBb10V/s1600/fakeOP01.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3vHgFUhPhrazTXXi5LX9s5difK859KHoP_LxdMTEyHepCZ7kiKDr8RFFSrLXBSBTGPzRsRfHqC6WviA1ph0GtQZcfNTXPUddRSJhaimfe04tRdSpKZlCILBANwf7zpsgh_XEw8fNBb10V/s1600/fakeOP01.jpg" height="208" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqp-sU1cNWdoeOSXeuU5DgXo6QF6reDM1AWzupJ31GlJQxSIk0ll3Z9k15A9AHOg0qrO3ka0TrscK_QOA_-dO9vECE2QJbIeyoK6rPOtSEOf1Hqg3XYfNofGaFiTrfqHvkqsnLNWzOP26l/s1600/fakeOP02.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqp-sU1cNWdoeOSXeuU5DgXo6QF6reDM1AWzupJ31GlJQxSIk0ll3Z9k15A9AHOg0qrO3ka0TrscK_QOA_-dO9vECE2QJbIeyoK6rPOtSEOf1Hqg3XYfNofGaFiTrfqHvkqsnLNWzOP26l/s1600/fakeOP02.jpg" height="230" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkl6ZJmkg3anyMXBZQP2h1osekUyQcK2z_GyBzWKH0hJPJj4E1uHoqtMQ_Jwma3US-QltdhJikg6ePEnz6gSUknXpv1aAzFPXizoDCLTqcTpTm3mF9dbKUa8zNZS4dKCsYLebw56v9OW7Q/s1600/fakeOP03.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkl6ZJmkg3anyMXBZQP2h1osekUyQcK2z_GyBzWKH0hJPJj4E1uHoqtMQ_Jwma3US-QltdhJikg6ePEnz6gSUknXpv1aAzFPXizoDCLTqcTpTm3mF9dbKUa8zNZS4dKCsYLebw56v9OW7Q/s1600/fakeOP03.jpg" height="171" width="320" /></a></div>
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<div class="p1">
這看起來真的是舊的拆機OP,從淘寶買來的。印字也很真,舊的也很真....</div>
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可是....假的。</div>
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<div class="p1">
先說OPA627/637,最簡單的方法就是量pin1跟pin5間的電阻,應該是50K上下。我從digikey買的OPA637BP都是差不多這個數值。</div>
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至於這個拆機品,只有2.5K左右.....</div>
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AD797也是阻值有問題。</div>
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如果這樣還不能確定的話,用一個放大100倍的線路就看破手腳了。</div>
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這是637真品的方波</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8RH0SbWYxtnylishbMOKDrzAGd_QltXDrE4cwYMZFxAv2JTnFfzQOjg6lVFsTuMYSW3GTXWDB816fLaOKRImwv0QvO-nVokAkv_aUGB_yGTHqp1gRNL8JgySbAR1EHBiv7YbIDJz-aqLC/s1600/OPA637BP.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8RH0SbWYxtnylishbMOKDrzAGd_QltXDrE4cwYMZFxAv2JTnFfzQOjg6lVFsTuMYSW3GTXWDB816fLaOKRImwv0QvO-nVokAkv_aUGB_yGTHqp1gRNL8JgySbAR1EHBiv7YbIDJz-aqLC/s1600/OPA637BP.jpg" height="268" width="320" /></a></div>
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下圖是「金封保真」637的方波</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjL5UVpYFBy1p2P8MW92-U35CxHgXTh7LufDKWYZwHK06FM20URdMl0NYD-cFKYYPde8UOR5jgMDM_w2dJYc5rpaxe7IFls5R6L-EBAIZGa4kkJbiI9Y3YIsP4qnnovB8aHJ1Z14Q2tBIFv/s1600/OPA627637.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjL5UVpYFBy1p2P8MW92-U35CxHgXTh7LufDKWYZwHK06FM20URdMl0NYD-cFKYYPde8UOR5jgMDM_w2dJYc5rpaxe7IFls5R6L-EBAIZGa4kkJbiI9Y3YIsP4qnnovB8aHJ1Z14Q2tBIFv/s1600/OPA627637.jpg" height="278" width="320" /></a></div>
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這是真品AD797AR的方波</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4ldnHTQR9WljXOUmLliC0gPE8RA1c5Xe842GeOjJ2Lg9mltuabZ4mFRVW77YIj8VLyVM9iDwDpUJ_0av_YnDtfYRQox-UAwgWh_pOlF_8X-dZwOVgXlsNkyGtzlf3Pwi1pMI9RYHNYjtK/s1600/AD797AR.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4ldnHTQR9WljXOUmLliC0gPE8RA1c5Xe842GeOjJ2Lg9mltuabZ4mFRVW77YIj8VLyVM9iDwDpUJ_0av_YnDtfYRQox-UAwgWh_pOlF_8X-dZwOVgXlsNkyGtzlf3Pwi1pMI9RYHNYjtK/s1600/AD797AR.jpg" height="269" width="320" /></a></div>
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這是「金封AD79AH」的</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKXSA8uOgxX5TDrVcRCQOMdzNGJY-UUiY0ZEnv_MJXYddX5E7HzkNHQlowwbvtn20MKmzdG3W7DmkZ3gYYWUMWBTptUTjzSNTQzcoTRaQe9JiDnZiESAHCT1nfu428-5s257d4kzILCezp/s1600/AD797AH.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKXSA8uOgxX5TDrVcRCQOMdzNGJY-UUiY0ZEnv_MJXYddX5E7HzkNHQlowwbvtn20MKmzdG3W7DmkZ3gYYWUMWBTptUTjzSNTQzcoTRaQe9JiDnZiESAHCT1nfu428-5s257d4kzILCezp/s1600/AD797AH.jpg" height="250" width="320" /></a></div>
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真偽立見,收工,退款。</div>
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但是過年前收到兩個小傢伙.....</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTG02nmdXAvvThJFZqgP-wdboBS7vichFJLQ7tbHgd1TE9V8n-GtWTIbb3khmEdHny-5DQFf4WdELmWnt4_UmCDKybAakDlnzRO2tW1SwlhUcLE2tkM-t7PPxq-g28-S-d4murt-AEcPY0/s1600/BM01.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTG02nmdXAvvThJFZqgP-wdboBS7vichFJLQ7tbHgd1TE9V8n-GtWTIbb3khmEdHny-5DQFf4WdELmWnt4_UmCDKybAakDlnzRO2tW1SwlhUcLE2tkM-t7PPxq-g28-S-d4murt-AEcPY0/s1600/BM01.jpg" height="241" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRNToguDn6IYqCYanGEFDeBbM6fsF3OLCvC_MImf7SiRuw9Z1_7IdlbadSVLmyH7LmBXMHcPhVP3ensQTPXvPYJ1yZUqxj5H9AQNSfT_yhHfzGTGLRRdHjhUa-qcqP0ja6hi0bTCibFA_c/s1600/BM02.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRNToguDn6IYqCYanGEFDeBbM6fsF3OLCvC_MImf7SiRuw9Z1_7IdlbadSVLmyH7LmBXMHcPhVP3ensQTPXvPYJ1yZUqxj5H9AQNSfT_yhHfzGTGLRRdHjhUa-qcqP0ja6hi0bTCibFA_c/s1600/BM02.jpg" height="258" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKUsQmqDzqhRJcIv4GhNHG_y36YI0H7THih-mOZev375NuUjVq7tKqKkVkbvOYYDc52_iRS-Tde9T2FSbUJodJU-GXxMj2jH-BwRCVS6Cr9sr-SLHvnF57Yn5s4_Dj18rsT-9TW8HrfAWJ/s1600/BM_BOTTOM.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKUsQmqDzqhRJcIv4GhNHG_y36YI0H7THih-mOZev375NuUjVq7tKqKkVkbvOYYDc52_iRS-Tde9T2FSbUJodJU-GXxMj2jH-BwRCVS6Cr9sr-SLHvnF57Yn5s4_Dj18rsT-9TW8HrfAWJ/s1600/BM_BOTTOM.jpg" height="234" width="320" /></a></div>
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<br /></div>
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當然除了量一下1-5腳的電阻值之外(大約在50k-60K),立刻上示波器測試:</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3aioo7MbOhixEiDrznEalNxBqgNWifPGT6OdzNEsrt4z-QsBPP2Ijkwd_XdE-EY7sYxyRTppztT8YwOaVht3DJ3SuyMznFhIBn6mpHEiB4ByRiWM0qXXnD8LlQ0cd3WhPDsdwE2aNMSVJ/s1600/OPA637BM.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3aioo7MbOhixEiDrznEalNxBqgNWifPGT6OdzNEsrt4z-QsBPP2Ijkwd_XdE-EY7sYxyRTppztT8YwOaVht3DJ3SuyMznFhIBn6mpHEiB4ByRiWM0qXXnD8LlQ0cd3WhPDsdwE2aNMSVJ/s1600/OPA637BM.jpg" height="267" width="320" /></a></div>
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可知這次的是真品啦!Get Lucky!</div>
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<iframe allowfullscreen="" frameborder="0" height="315" src="//www.youtube.com/embed/h5EofwRzit0?rel=0" width="560"></iframe>
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DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com3tag:blogger.com,1999:blog-8728071242293079417.post-66438984177191863542014-01-31T13:44:00.000+08:002014-03-01T12:11:13.485+08:00OP Passive RIAA Pt.3<h4>
Offset</h4>
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上回的MC RIAA放大,比較麻煩的還是直流輸出的問題。OP做的再怎樣精密,由於工作時溫度會有漂移,也會造成工作點的漂移。如果是一般的情況,10倍放大,透過直流SVR調整,這個漂移可以在1mV以下;但是,MC放大的兩級都是100倍,就算第一級可以調到1mV以下,第二級又會再放大一次,變成100mV....</div>
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我自己是沒在怕的啦,前級有輸出交連電容擋起來了。不過如果有必要,直流盡可能不要比較好。</div>
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所以,可以加個輸出交連電容:</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgbiqkU8HjFENLr8GL2rE0kDglm8fsAUiBBWoPhWqaQswlLIhaWaTcXZ_T0dy0oVUBwjnucd1ploPBPpHvF1_cxwCC5H7b72PAogk6gwpDAOwj1OKRnxfgQKGXtsl1DcLLrkW52la8Elkxu/s1600/PCB-DC-block.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgbiqkU8HjFENLr8GL2rE0kDglm8fsAUiBBWoPhWqaQswlLIhaWaTcXZ_T0dy0oVUBwjnucd1ploPBPpHvF1_cxwCC5H7b72PAogk6gwpDAOwj1OKRnxfgQKGXtsl1DcLLrkW52la8Elkxu/s1600/PCB-DC-block.jpg" height="118" width="320" /></a></div>
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另外一種調整直流輸出的方法,叫做DC-servo,圖中LT1097就是擔任Servo OP的工作:</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5NhaYz1ZfMujvhZa7lR_Ih4RRVbEcrwsrXLQ7JkRdJbbE1zVx3gIT-QH-pvHwX5tUq5g95WF9sKvSdINYckYO67U1wSrKPo6DjXV3aD4n4ydBo1Z-NhlkNfCWucNHvN76FKcPb3QyKre2/s1600/DC-servo.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5NhaYz1ZfMujvhZa7lR_Ih4RRVbEcrwsrXLQ7JkRdJbbE1zVx3gIT-QH-pvHwX5tUq5g95WF9sKvSdINYckYO67U1wSrKPo6DjXV3aD4n4ydBo1Z-NhlkNfCWucNHvN76FKcPb3QyKre2/s1600/DC-servo.jpg" height="231" width="320" /></a></div>
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有效,影響聲音的程度會比交流回授要來得好。</div>
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用這片PCB也可以辦到~~</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrjyaQ42xUsUzh_AktkkoC-bjgev-3QIjsrE_WCZkeK7etNLW-b8fLGfvDE9sj-__LMdJ4uTMC3PpjRwpq__H9LAI6ZASV7gwJ0DLGy8GlhgKZEjBRAYAL-Q6aw2NjRiqS-HDShesXxrAl/s1600/PCB-DC-SERVO.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrjyaQ42xUsUzh_AktkkoC-bjgev-3QIjsrE_WCZkeK7etNLW-b8fLGfvDE9sj-__LMdJ4uTMC3PpjRwpq__H9LAI6ZASV7gwJ0DLGy8GlhgKZEjBRAYAL-Q6aw2NjRiqS-HDShesXxrAl/s1600/PCB-DC-SERVO.jpg" height="246" width="320" /></a></div>
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如果搭配直流調整的SVR,Servo的效果(或是Servo OP的負擔)會最佳。OP27 OPA134 LF411等等都是DC-servo OP的好選擇。</div>
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此外,這片小板子還可以這樣用喔:</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4RlrfZJfl9Kx5KCQIuGW1nFWEStQga12s-2Rmx4t_NeZnLhPu3nZiJ3wU3suSI4jkOyyL5EUUuhU3UNSSn-akkWyf4nxI0DUeDsqaAKQBst8sPOhQg5qFA0C3vezZkWG9weC46uDVUcD-/s1600/PREAMP.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4RlrfZJfl9Kx5KCQIuGW1nFWEStQga12s-2Rmx4t_NeZnLhPu3nZiJ3wU3suSI4jkOyyL5EUUuhU3UNSSn-akkWyf4nxI0DUeDsqaAKQBst8sPOhQg5qFA0C3vezZkWG9weC46uDVUcD-/s1600/PREAMP.jpg" height="206" width="320" /></a></div>
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<h4>
繼續試聽</h4>
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前面說到在MC放大的場合,OPA637的雜音有稍微大一點,於是我換成了LT1028 + AD797的組合,雜音小聲音不差,只是低頻卡卡。於是我又找時間,把兩級都換上了LT1028,仔細調整Offset之後,上機試聽。嗯......沒什麼不對,但也沒什麼對。雖然頻寬細節等等都相當好,可是層次感有點奇怪,某些音樂的細節會互相疊在一起,有點打架,而且對我而言,這組合聽起來沒感情,沒有音樂感。好吧,再換上兩級都是AD797來看看。哇!令人相當驚艷!我覺得音樂感,抑揚頓挫,平衡,頻寛,都非常好!低頻沒637那麼有彈性而已,但是換來的,是充滿音樂性,充滿光輝,充滿感情的樂聲,音符間的連續性更好了,每一個演奏都有故事了,又讓我嘖嘖稱奇。</div>
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找時間再繼續試聽AD797跟637會擦出什麼火花........<br />
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如果輸入端空接,會發生什麼事?<br />
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我們面對的是Input offset voltage(Vos)跟input offset current(Ios)這兩個問題。像NE5534的Vos是0.5-4mV,所以當放大倍率高達1000倍的時候,會有0.5-4V的直流輸出,再加上Ios,開機時還未達穩定更可能有12mV的Vos。這個我已經用AD797看過,輸入端開路,開機時會有12mV的offset電壓,再往下降,所以輸出端高達12V的直流並不奇怪。同時用OPA637再測,因為它的Vos跟Ios都很小(FET輸入),所以電壓不會跑到那麼高,offset是0.03mV,輸出直流會是0.4V左右。<br />
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這個板子只是正確反應了OP輸入偏置遇到高倍率放大所產生的結果而已,平常若沒有做到那麼高倍率的時候,是不會有這個狀況的。<br />
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而且調整輸出offset時,我也是建議接到唱頭上之後再開機調整,才會得到正確的低直流輸出。</div>
DIY Coffinhttp://www.blogger.com/profile/14363331921317917232noreply@blogger.com4