Hi dear members I am chasing/hunting down a buzz in the speakers that seems to go down (still present) when touching the metal stem of the volume potentiometer. Connecting the metal casing of the potentiometer to ground does not seem to make any difference.
This unit has been recapped (except) FM board. New transistors installed, rebuilt power supply also.
No matter what input is selected the problem still persist, no signal.
No wooden cover, metal bottom and casing, I tried re-installing them and no difference.
The positive of the main bridge rectifier H009 has 0.5 VAC residual. It could be a ground loop or some noisy transistors...do not know. When you touch the potentiometer metal stem (volume) the buzzing goes way down. Also it is an intermittent problem.
Faceplate, bottom cover & top cover are removed.
This unit has been recapped (except) FM board. New transistors installed, rebuilt power supply also.
No matter what input is selected the problem still persist, no signal.
No wooden cover, metal bottom and casing, I tried re-installing them and no difference.
The positive of the main bridge rectifier H009 has 0.5 VAC residual. It could be a ground loop or some noisy transistors...do not know. When you touch the potentiometer metal stem (volume) the buzzing goes way down. Also it is an intermittent problem.
Faceplate, bottom cover & top cover are removed.