I dug an old 15 watt Marshall MG15 out of the basement for recording and realized why it was there in the first place. When I turn it on there is a high pitched tone that doesn't go away. It seems that all of the amp's regular gain settings occur between 0 and 1 on the knob and anything after that just gives horrible horrible feedback. I have no idea how or why this is happening but I've opened it up and don't SEE anything wrong with it. Then again I'm no electrician, just a musician.
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well the knob is always off, but if you say that it could cause
well the knob is always off, but if you say that it could cause problems just being there then I might as well pull it out, I never use it anyway. I figured out the high pitch thing was a bad input connection. The gain issue is still a problem though. Are you saying that could be caused by the reverb unit?
Bad tubes? Wait, that's a solid state amp. :wink: It could
Bad tubes? Wait, that's a solid state amp. :wink: It could be anything. Of course, check the obvious like speakers, loose wires, etc... If not, then you'll probably need to take it to a tech. Blasted solid state amps.