DC on Phase Inverter grids - what the? 93 Fender Blues Deluxe

[Guitarist]

I'm seeing over 12 Volts somehow on the grids. Pull the PI tube and its gone so it's not leaking from the prior blocking cap. The cathodes are also over 40 V and should be 33 V from Fender schematic. I referenced a Marshall voltage chart to confirm - there should be no voltage here!

Amp does work though and sounds barely ok. MUCHO lows.

EDIT: Enzo advised to a similar topic:

32v at what grids? If you mean at the PI grids, don't measure from ground. Your cathodes are tied together and sit at 50v. Measure voltage to each grid FROM THAT CATHODE. I bet you get a reading of about a volt. Meaning that if the cathode is at 50 the grid is at 49. When measuring to ground, your meter loads the circuit.

So, now having done this it reads +2 and -2 Volts. So I think we're good. Back to the bench....

[Enzo]

Glad I could help.

[Amp Kat]

You should get an extra post count for that Enzo. You actually fixed the amp before you posted. damn