Quote:
Originally Posted by old_coot88
A possibility: the 'gradual fade to nothing' could be caused by a 'floating grid' condition of the output tube. That's where an open (or misconnected) grid resistor going to G1 of the tube allows the tube to gradually self-bias to cutoff.
Does the audio become distorted during the fade, or remain undistorted?
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I agree 100% Look at this first.... Bad resistor, possible coupling cap bleeding
some DC to the grid....
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