Tube Amp Archive

Sounds like either a tube or the OT. Most likely a tube. Replace each one with a known good one until it either works or you eliminate the tubes as being a possible cause.

Agreed! I have a bunch of old RCA's I would let go for a fraction of that price... wow!

This change will not make your amp louder. It will just have more gain. I would change all the tubes as a weak tube can have give a low volume characteristic... Try this and report back...