Ampeg B12-XT

[Big chief]

Tremolo switch appears not to be working voltages are all within limits
Replaced bypass caps
All tubes tested good
Can you wire around the VM-1 switch as I cannot locate one on the internet

Or any suggestions

Thanks

[PRR]

For others:
https://drtube.com/schematics/ampeg/b12xt.gif

"VM-1" is the "roach" center top. Routes to "Z" top and a bit right of there. Snipping "Z" should kill all trem action yet still pass signal. A NE-2 neon and a couple LDRs might be a DIY roach.

[Latole]

Not sure I understand what you need.

Most of the time for tremolo issue, I replace all coupling caps, not bypass caps. And each time it work

[sluckey]

Can you wire around the VM-1 switch as I cannot locate one on the internet

VM-1 sold here...

     https://www.fliptops.net/catalog/p-100088/vibrato-module-vm-1-gv-and-x-series-amps

[Big chief]

Thank you very much