OK, i just reflowed everything I could get to that may have been suspect. Still the same problem, but noticed that using some cheap headphones allowed me to listen to what the hum was doing which sounded more like an RF issue. When I would move around the hum pitch would change. Also, when turning up the volume pot, it would get louder, then it all of a sudden went away. The hum was loudest when at it's lowest setting and would sometimes go away as you turned it up, then would go away again at max volume. No consistency. Weird stuff. So I try different tubes and found that the stock 6080 tube worked okay but almost every tube I tried would hum at least upon turn-on including a tung-sol 5998. Then I found one tube that was dead quiet even at turn-on. An RCA 6AS7G. No hum at all. Any ideas? The other tubes used to work great. I still believe something is wrong, just don't know what...
