WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
I have a faulty Miniwatt N3 (and well now my APPJ tube amplifier that makes a popping sound, though the smd parts are still being replaced). Does anyone have any idea or experience on how to buy a new pcb for them somewhere?