I'm hoping for an assessment of what's the problem here. I've just replaced the pots in my 1982 2203, and after soldering in the new pots and turning the amp on to test things, there's no guitar sound being passed by the amp. I can hear normal background static hiss which I can manipulate it with the knobs. The Master, Treble, Middle, Bass, and Presence knobs all have the effect of the static that I expect them to when I turn them. The Preamp knob, though, doesn't produce a sonic effect on the static hiss that is what I'd expect it to. Instead, it sounds quiet at the start of its sweep, from 0 - 2 the sound gets quieter, from 4 - 7 a low buzz increases in volume, from 7.5 - 9 it gets quieter again. The Preamp knob is also scratchy when it's turned. I measured the pots before installing them, and the Preamp knob seemed to read fine. I took lots of photos of everything before I desoldered anything, and I think everything looks soldered just as it was before. Here are photos of my soldering compared to the original. Original pots: Original pots closeup: New pots: New pots closeup: By the way, all the original pots are significantly under spec. They read as follows: Presence: 20k Bass: 798k Middle: 20k Treble: 160k Master: 937k Preamp: 789k The new Alpha pots I've installed are all above spec, except for the Presence knob, which is slightly under its 25k speck, at 23k: Presence: 23k Bass: 1.04M Middle: 25k Treble: 256k Master: 1.05M Preamp: 1.04M I would expect old pots to increase in value as they age from maybe the material on their elements wearing off.