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| [#5755] Leak Club for Leakies or Leak user YC, These are KT66's cathode resistors, i.e. that bias the power tubes. Instability will kill the expansive tubes! Be warned. Go for RS 620K or 680K @7W. A&B has 2W, the maximum, only and is, as you may know, unreliable at high temperature (7W!). |
rcwy 正式會員221.xxx.xxx.253 |
2005-05-13 22:39 | |
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| [#5756] Leak Club for Leakies or Leak user YC, On restoration of Leak TL/12.1, click the releavant website to know more about what components are OK or recommended. I recall: DIY of my cloned 12.1 had been my learning process. I am sure there are a lot more that I have not yet learnt. Read more! before you turn on the soldering iron. :) |
rcwy 正式會員 221.xxx.xxx.253 |
2005-05-13 22:43 |
| [#5757] Leak Club for Leakies or Leak user Thanks for the note. If I parallel two 2W AB, then it is 4W. Running 60mA through it will be about 2.16W. But I take your advice, too much heat for AB just will make it not so stable. I may opt for some 620ohm 7W resistor instead. |
yukclee 正式會員 218.xxx.xxx.32 |
2005-05-13 22:46 |
| [#5758] Leak Club for Leakies or Leak user YC, Visit this website if you have not yet. http://werple.net.au/~kiewavly/TL12_restore.html A cathode resistor creates a potential drop that is eactly the negative bias of the tube concerned. The stock value is 600K, i.e. any cathode resistor which is lower than 600K will make the negative bias too positive, making excessive current passing through the KT66. The usualy current for KT66 should be below 60-65 mA. For this reason, it is SAFTER to use 620K than 560K. But I would recommend 560K for doubled safety of the expansive GEC KT66s! :) |
rcwy 正式會員 221.xxx.xxx.253 |
2005-05-13 22:51 |
| [#5759] Leak Club for Leakies or Leak user Typo: "But I would recommend 560K for doubled safety of the expansive GEC KT66s!" should read But I would recommend 680K for doubled safety of the expansive GEC KT66s! |
rcwy 正式會員 221.xxx.xxx.253 |
2005-05-13 22:53 |
| [#5760] Leak Club for Leakies or Leak user Thanks, Richard. Pointstaken. I will go for the 680 ohm cathode resistor. |
yukclee 正式會員 218.xxx.xxx.32 |
2005-05-13 22:59 |
| [#5761] Leak Club for Leakies or Leak user Gingers, KT66-lover Your chance to stock this unusual KT66-amp!  |
rcwy 正式會員 221.xxx.xxx.253 |
2005-05-17 21:19 |
| [#5762] Leak Club for Leakies or Leak user Tannoy!  |
rcwy 正式會員 221.xxx.xxx.253 |
2005-05-17 21:19 |
| [#5763] Leak Club for Leakies or Leak user Your chance to stock this unusual KT66-amp! ---------------------------------------------- Tannoy users' chance : ) |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 21:38 |
| [#5764] Leak Club for Leakies or Leak user Your chance to stock this unusual KT66-amp! -------------------------------------------- Mono :-( |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 21:39 |
| [#5765] Leak Club for Leakies or Leak user Stereo starts from mono! |
rcwy 正式會員 221.xxx.xxx.253 |
2005-05-17 21:52 |
| [#5766] Leak Club for Leakies or Leak user Stereo starts from mono! --------------------------------- I have no single Tannoy : ) |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 21:55 |
| [#5767] Leak Club for Leakies or Leak user Gingers, Finally got the time to check up Yuen's Stereo 50. All the TCC caps leak, as usual. Fortunately all the resistors and electrolytic caps are working perfectly and the cathode voltages are rock stable at 27V for the four tubes. I throw in some Cornell Dubilier caps temporarily and the sound is very good. More lively and smoother than the M8b although not as powerful. Got some new TCC caps from your friend today. Thank you. |
F2ayeung 正式會員 202.xxx.xxx.178 |
2005-05-17 21:56 |
| [#5768] Leak Club for Leakies or Leak user Gingers 50 welcomes Yuen 50 : ) -------------------------------------- Got some new TCC caps from your friend today. TCC is a must ??!! : )  |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 22:01 |
| [#5769] Leak Club for Leakies or Leak user Yeung Any updated photo? : ) John  |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 22:03 |
| [#5770] Leak Club for Leakies or Leak user My 50 with Hovland cap : ) "If you want see-thru, high definition,detail and listenability, try the musicaps" 假如你想要看到通透, 高解析度,細節以及可聽性,請試試音樂電容(Mucicaps). Joe Roberts, Editor, SOUND PRACTICES,Issue 6,1994 "The improved signal transmission of the Hovland foil capacitors elevated the speakers to a new level of naturalness, clarity, and immediacy. 改進的 Hovland薄膜電容信號傳輸提昇喇叭到自然性, 明晰度與直接感達到新的層次 特點: ．發出額外的動態速度,凝聚正確的音質和深層的音場, 以及真正的擁有暫態間寧靜,全面性中性頻段特質 ．極低的DA,DF及ESR ．出廠前100%的絕對品質確保測試 ．聲音品質超值,無處電容可與比擬-價格則除外 ．均勻一致的卷繞處理,確保毫無麥克風效應產生 ．純銅鍍銀多芯引線,鐵弗龍隔離 ．導線手工特殊過錫處理 ．專用設計喇叭分頻器電容  |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 22:05 |
| [#5771] Leak Club for Leakies or Leak user Gingers, Talking about TCC, I compared the TCC bought from your friend with the Super Metalpack I got. I find the ordinary one more musical, mellow and fluent. 唔通越漏越好聲?? |
F2ayeung 正式會員 202.xxx.xxx.178 |
2005-05-17 22:06 |
| [#5772] Leak Club for Leakies or Leak user Talking about TCC, I compared the TCC bought from your friend with the Super Metalpack I got. I find the ordinary one more musical, mellow and fluent. ------------------------------------ My guess : ) SuperMetal needs much more time to warm up ??????? |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 22:07 |
| [#5773] Leak Club for Leakies or Leak user My 50 came with Hovland cap. I replaced the RMG resistors : ) |
Gingers 正式會員 221.xxx.xxx.60 |
2005-05-17 22:08 |
| [#5774] Leak Club for Leakies or Leak user Gingers, Yuen's lucky in that the 3 'chalk' resistors are also working perfectly. We can compare his amp with yours later on to see how TCC compares with Hovland. Actually I like Hovland caps too. Better than those MIT, Kimber, Jensen Copper foil... |
F2ayeung 正式會員 202.xxx.xxx.178 |
2005-05-17 22:14 |
