I purchased an ESR Revival 1952 and have some tech. questions? Does any one have any information?

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spoony
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Joined: 2008-08-24
I purchased an ESR Revival 1952 and have some tech. questions? Does any one have any information?

Hello everyone,
The plate voltage on my ESR 1952 Revival is high @ 500v. I am considering lowering the voltage to around 425-450v. I have a pair of JJs in there right now but they max out at 500v and the amp is actually 502v. Does anyone have any ideas regarding this? Also is there a way I can identify the speakers and the date of the amp?

I purchased this amp a few years ago and have slowly been bringing it back, mostly cosmetics issues, to as original conditions as possible. The amp has always sounded great to me but needed a little electronic work. Thanks to who ever posted the schematics they are invaluable. I hope to post some before and after pictures when I finished.

I would like to say thanks for any help given before hand.

Heavymental
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Joined: 2008-12-13
Don't worry about the plate

Don't worry about the plate voltage, you have a 20% (at least) margin. The 1963 Fender Bassman ran at 485 volts as opposed to earlier and later models at 437. I have an Altec amp that runs at 1100 volts on 6Ca7's which have a rated max of 800 volts. They ran non-stop for 20 years without a problem, as long as the amp is well designed I wouldn't worry. My Earth amp is a 1973, the only thing not original is the tubes/

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