[Patrick]

Recapped, changed resistors, replaced wiring, and aligned. It working great. Put it back in the cabinet, powered on, and after the tubes warmed up, got a hum. Removed chassis, and still have a hum. I can still pick up stations. Hum does not change with the volume. Rechecked the wiring, paralled new filter caps, no change. When I prod around the 42 output tube, hum volume seems to vary. Stuck another 42 in there, same as first one.

Since it worked before I put it in the cabinet, I focused my attention on solder joints and wiring. Nothing wrong there. And since the hum doesn't change with the volume, I thought it might be easier to find. But the volume pot is on the antenna lead-in.

Any ideas?

Thanks,

Pat