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RE: PIO coupling caps and leakage?

Posted by Michael Samra (D) on April 25, 2016 at 19:06:54

In Reply to: PIO coupling caps and leakage? posted by Tweaker456 on April 24, 2016 at 10:57:35:

I am told by a well known amp designer not to use PIO because frequent leakage problems can throw the bias off and create problems. He thinks they are rather unreliable. Does this pertain, IYO, mostly to older caps or particular caps as opposed to newer or maybe the Russian K40Y's?? Thanks, Tweaker

A lot of these so called amp designers want to use stuff that is cheap and available.Like Gary M. mentions below,there were some issues with modern Jensen and Audio note caps but the K40Y and Vitamin Q caps,Gudeman,Westcap,Astron,Pyramid,those were all hermetically sealed from moisture so there was no way moisture could penetrate the cap to damage it.You could find an occasional cap that was bad but very few.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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