A few years ago I picked up this little gem of an amp at a gun show for a paltry 25 bucks. Not a bad snag!
It worked great, except the volume knob didn’t seem to do much… it always sounded like it was on full blast. So, I brought it down to Skullspace to tinker with it.
Aside from the potentiometer not really changing the volume, it was also quite scratchy when changing volumes. This is usually a sign of a worn-out potentiometer, so I ripped out the old one and temporary wired up a replacement off ebay.
I carefully tested the amplifier (you really dont want to touch the high-voltage tube supply wires in there when it’s powered…) and it sounded way better than before! I deemed it a success and installed the new potentiometer, still with test connections:
Everything seemed to work alright, so I soldered everything in place:
The only issue I faced was that the old wires did not really wick up the solder so well. I suspect there are some poor connections because of this, but for now it works… maybe some proper flux paste would work better than rosin-core solder?
Stay tuned for an audio clip!