05-01-2020, 10:30 PM
The hum should be easy to sort out.
With a scope earthed to the chassis/0V and on AC go for the blue capacitors with the positive ends up. There is bound to be one that is going open circuit. You might even find that one is causing the amp to oscillate at some ridiculous frequency.
With a scope earthed to the chassis/0V and on AC go for the blue capacitors with the positive ends up. There is bound to be one that is going open circuit. You might even find that one is causing the amp to oscillate at some ridiculous frequency.
