SF Princeton Reverb Tremolo only works when amp turned off

[booj]

AND it worked when I got it (normally). It had a problem with a loud pop when I would tap the fiberboard. That I fixed with a solder re-flow. Then the trem stopped working. Weird thing is I can see the output tubes pulsating visibly, I get a pulsating signal on the grids viewed with an o-scope which basically stays the same for the short while it starts working after the amp is turned off. Voltages such as they are, which is pulsating are normal. I have
>Swapped trem tubes, and checked tube voltages
>Replaced all the caps in the trem circuit
>Checked all the Resistor values in the trem circuit.
>Re-flowed all connections.
The thing that is really confusing me is seeing those output tubes just pulsing away to beat the band with absolutely no tremolo effect coming out of the speaker.

[booj]

fixed it. I was so concerned with proper lead dress when I routinely replaced the bias cap that I got it turned around backwards when I soldered it in. Must have been the leakage from the bias cap being backwards that prevented the trem from operating properly.

[Jazz P Bass]

Oops.
Glad that you found it.