My m3 worked perfectly a few days ago. But since one week I hear noise. Impossible to remove with a ground locker. But when I isolate the potentiometer chassis the noise disappears. But it is impossible in my setup to isolate it. More ever recently when I turn on the M3 the ground louker smokes at the capacitor.
I use this method:
I think that a component is dead on the ground channel, but I have no idea of the culprit.
Thank you for helping me.