1952 Revival 2x12 combo

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Joined: 2010-02-23
1952 Revival 2x12 combo

Just picked up a tweed beauty. Upon turning it on however, I am getting that "farting out" sound, and I have tried two different sets of tubes and it doesnt help. The guy I bought it from said it sounds like its out of bias. Could the bias have been affected during shipping? Where the heck on this amp do you adjust the bias? I have it pulled apart and cant find it. Thanks!

Joined: 2010-04-08
It can... but not likely. I

It can... but not likely. I would bias it... look for a tiny trimpot under the Master Volume pot mounted on the PCB... mine is mounted vertical.

Joined: 2010-08-06

just wondering if you found the pot on the main board and if it cured the problem ? I have a similar problem but not sure how to set the bias .

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