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Old 18th August 2012, 04:06 PM   #11
zman01 is online now zman01  Bangladesh
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SSE Capacitor Values C10 C12 C20 C22
$250+ for a cap! Not for me sir!
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Old 18th August 2012, 07:37 PM   #12
Davec113 is offline Davec113  United States
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Quote:
Originally Posted by zman01 View Post
$250+ for a cap! Not for me sir!
They give breaks on quantities of 4+...
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Old 31st August 2017, 05:08 AM   #13
pelayostyle is offline pelayostyle  United States
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SSE Capacitor Values C10 C12 C20 C22
Sorry to resurrect an old thread but I found some 1000uf 63V Nichicon FG in my stash box that I can use for C12 and C22. From Georges response earlier I would assume that this would be OK to use? Would the same apply for C20 and C10? Just wanted to double check with you guys.

Last edited by pelayostyle; 31st August 2017 at 05:18 AM.
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Old 31st August 2017, 06:06 AM   #14
zman01 is online now zman01  Bangladesh
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SSE Capacitor Values C10 C12 C20 C22
pelayostyle,

C10 and C20 are for 6.3 volt capacitors, right? Does a 63V capacitor fit in that space?
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Old 31st August 2017, 06:09 AM   #15
pelayostyle is offline pelayostyle  United States
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SSE Capacitor Values C10 C12 C20 C22
Quote:
Originally Posted by zman01 View Post
pelayostyle,

C10 and C20 are for 6.3 volt capacitors, right? Does a 63V capacitor fit in that space?
I have the 6.3V version in 1000uf too.
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Old 31st August 2017, 06:43 AM   #16
zman01 is online now zman01  Bangladesh
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SSE Capacitor Values C10 C12 C20 C22
If our understanding of post #2 of this thread is correct, then 1000uf should be usable.
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Old 22nd September 2017, 01:53 PM   #17
Altecboy is offline Altecboy  United States
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Default cathode bypass cap for 12at7

I notice here and elsewhere there is much conversation about the size, type and bypassing of the capacitor to use to bypass the cathode resistor of the output tube.

How about the input tube? It would seem to have a similar effect. Maybe more.

Anyone have any experience with this?
thanks.
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Old 22nd September 2017, 08:28 PM   #18
Tubelab_com is offline Tubelab_com  United States
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The bypass cap on the input tube performs the same function as the cap on the output tube, but sees far less current, so it is not as critical. I would still use a good quality cap because it is in the signal path.

A 1000 uF cap is OK, as is a 4700 uF (tried it because I had some) but I wouldn't stray too far outside this range. Too small of a cap will affect bass response, and too big could cause a warm up bias shift especially with a big coupling cap......I had strange results with 10,000 uF in the input tube bypass, 2200 in the output tube bypass, and 1 uF coupling caps. I tried them because I had them, but got some weird woofer motion that took a second or two to settle out when cranking some bass heavy music.
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Old 24th September 2017, 10:36 AM   #19
Altecboy is offline Altecboy  United States
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thank you George
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