This Week on the Bench - Peavey Vypyr 60 AND Fender Dual Showman 'Red Knob"

[mtlbasslad]

OK it's either bad technique or bad eyes (or both)...
Now I have a signal at the grid that varies as I adjust gain, and through the cables to the tank input - so trans is good I guess..
And the tank tests good - input 1 ohm output 200 ohm - and lots of sproing when I tap the tank, so input transducer is toast even if it tests good?
Still have 16Vdc at cathode of 12AT7, resistance from pin 3-8 to gnd is 1K2...

[g1]

Can you measure the AC voltage at the plates of reverb driver?
Compare to example from 65 Twin in post #9, should be similar. Try to set up so you have test signal of 2V AC at the grids, should give ballpark 67V AC at the plates.
And have you tried another AT7 for the driver tube? Still 16VDC at cathode? (you can swap in the PI tube to test)