Hello and thank you for adding me to the forum, I'm glad to be apart of this place.

I recently got an Ampeg VH140C and the chorus section is having issues. It worked fine without the selector pedal for a while, however it soon started to cut in and out. Thumping the amp helped for a moment but would stop working again. I'm starting the repairs with a simple pot and jack cleaning, then will check the solder joints. I've played through many amps and this model, even with its major flaws, is an absolute favorite.

So, what's the deal with the ss/vh ampeg, why are they so fragile? How do I keep this amp going?