Silvertone 1482 Tremolo Help

[misterc57]

Quite the coincidence that I have another Silvertone amp with a non working Tremolo.

Schematic attached. I have check every resistor and pot in the tremolo circuit. Everything appears correct. There is no roach in this one. Not sure what to try next.

Thank you!

silvertone1482.pdf

[Helmholtz]

This tremolo works by bias shift modulation of the power tubes.
Check for pulsing voltage at the LFO plate. If not - replace tube.

[misterc57]

Replaced tube did not change condition, no pulsing voltage. Started to probe voltages at the 6AU6A and tremolo started working. In the end, I tensioned and better cleaned the tube sockets and tube pins. Tremolo is working!

Thank you