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Re: Keep 'Em Cool, because...

Posted by Alpha Al (P) on August 24, 2006 at 22:19:48

In Reply to: Keep 'Em Cool, because... posted by Thomas Martens on August 23, 2006 at 15:05:49:

Hi Thomas:
I agree, except for the part about using caps with much higher voltage rating.

Using a cap with a much higher voltage rating never allows it to "form" properly. That's why cathode bypass caps for preamp stages are commonly 5V rated. The voltage is never above 3V.

I have serviced amps where someone had replaced these with 50V caps, and they lost bass response. The caps were not working correctly at lower frequencies. Replacing with low-voltage caps of the same value solved the problem.

I believe that caps(electrolytic especially) sound best when used at close to their rated voltage.

Regards, Al F

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