Quote Originally Posted by oldguy
I think Jim P gave a fair evaluation of his prognosis after perusing the schematic of the amph. I would suggest taking it to an amph tech to confirm (or disprove) his theory as to the cause of the feedback.
Pay someone that knows what they're doing to fix it, eh? That's quite a concept you got there!

Nawt yet... Methinks I'll try to verify that all the existing components are within specs before I throw in the towel.

I checked the tubes.
! checked the tank.

What's next? Maybe pull the chassis and have a look inside? How do I do that without electrocution? How do you drain capacitors safely? Lick the ends?