Well, I got the Weber power transformer transplanted in the old Teisco and I get decent tones, but a loud 60Hz hum which increases with volume. Since there's only one tube (a 6C6) before the volume pot, it's got to be 'round there someplace. Of course, that's the part of the amp I touched the least. I've replaced the PT, filter caps, cord, power switch, fuse holder, and removed some mojo, I suspect. I did remember to ground the center taps of the PT. The 6C6 tube is one of those with the grid connector on top with a shielded wire. I s'pose I could check it, but I suspect shielding only would make a difference with RF interference, right? The input jacks are flimsy and a mess, so I can check grounding there. The heater wires don't seem to be near the grid, so I don't think the hum comes from there. Hints about tracking this down?