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|19th February 2011, 08:20 PM||#1|
Join Date: Jan 2011
Peavey Windsor Studio The output tube El 34 burned out
I tjeck the plate voltage et is 470V maby too heigh for SE Class A Pentode singel tube. Hmm.
Is ther enybobby who has tjekt the plate voltage. is et around 270V ????
I think the reason et burned, was because the bias was wrong:
power anode (Wa) Ua 465- Uc 28 * Ia 72mA= 31W = burne out. and max is 25W
should I only re adjust bias or should I also lower Ua befor adjust bias.
some suggestions ................
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