I just bought this amp today and don't want to break anything. I heard from someone that if I wanted to change the rectifier mode (this amp has 3 modes: Solid state rectifier, hybrid rectifier, and tube rectifier), I would have to re-bias the amp head. Is this true?
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Changing rectifier modes in B52 AT100...
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Incorrect. Everything should be already set correctly. When you change power tubes, then you'll have to set the bias again. I've worked on one of these and it had 2 separate bias pots inside for the different rectifier modes, but they should have been properly set at the factory. You should be good to go at this point.
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