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Post subject: HIgher voltage rated caps, in bias supply
Posted: Fri Dec 30, 2016 7:03 pm
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How many use full 450 or 500VDC rated filter caps in the bias supply (...I don't). The idea of this, is if one output tube shorts between the screen and grid --- this higher rated cap will withstand the short. Keep the bias supply intact. And potentially save the other output tubes and output tranny.

Some ppl on other guitar amp forums suggest this for heavily gigged combo amps, where Chinese or cheaper Russian tubes are being used.

Thanks!


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Post subject: Re: HIgher voltage rated caps, in bias supply
Posted: Fri Dec 30, 2016 10:03 pm
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*Somebody* has to buy those junk tubes. And over-spec'ing their bias-supply caps provide a parachute for when the excreta inevitably hits the fan.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: HIgher voltage rated caps, in bias supply
Posted: Sat Dec 31, 2016 2:52 am
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Joined: Fri Feb 05, 2010 4:31 am
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That is why there is a fuse.
Good quality caps may hold more than they are rated.


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