Hello, folks I just finished re-capping my '65 Deluxe Reverb and now find that the reverb goes into feedback if turned up to 5 or so. I really don't expect a Fender amp to be unstable at all. I haven't started trouble-shooting this - I just wanted to play the thing last night. It's a nice little amp. Possible problems to look for? 1. V3 Reverb drive tube (it's a new JJ ECC81, but maybe I'll put an old 12au7 in there). This failure might be due to too much gain in the drive or recovery circuit. But it was designed for the ECC81 type tube, so not likely the issue. 2. Dirty reverb in/out jacks or tube sockets. Not sure how that would cause this. I should do a little cleaning though, I noticed some pots were pretty crackly. 3. Reverb tank plugged in backwards. I thought that would give me no reverb output. The old bypass cap's were dried out so it's been a while since this amp has seen proper gain staging. The reverb circuit is a feedback circuit, so not too surprising that some failure modes cause it to become an oscillator. Just for interest's sake, here's the Deluxe Reverb glowing behind my latest Tele. Any ideas on what I should look for?