I just got a Pro Jr and I have a problem that maybe one of you guys can help me out with- the amp was shipped to me, and was packed well, no cosmetic damage at all. But when I turn it on, it has a decently loud buzz (even with vol. on 0 and nothing plugged in the input). It also passes signal (quietly) at volume set at 0. Then as I raise the volume, at around .5 the signal gets a bit quieter and then gets louder as normal. The amp sounds great otherwise. When playing I don't notice the buzz. I've reseated the tubes, and swapped out the EL84's and the 12AX7's with known good tubes, but no change. As I raise the volume up to 10, I hear the normal amp noise I would expect- some hiss, a little hum, but different sounding. There is no change in the "problem" hum at different volumes of the amp. The pot is a bit scratchy too, could be a bad vol pot (which is why it passes signal at 0) or just bad connection of the pot since it's not point to point... One final thing- the EL84's get screamin' hot after only a few minutes. I'm pretty sure that's normal though, I have another EL84 amp and they are raging after a short time too. any thoughts? Thanks!