Who's got'em? I've had a Fender Supersonic 22 head for a little over 18 months that's been a noisy little bastard the whole time. I pretty much gave up on it. Without opening up the chassis, or even trying to ground the red/white RCA's that connect the reverb pan I isolated just about everything to the reverb section. The noise was worst on the gain channel when the reverb was turned up *engaged or not as when controlled by foot switch* but started to hum any time the pan was turned up. So I changed the Reverb tubes with no luck. I finally took out V1 and decided to try a few other tubes. I have a JJ (Slovakian), Mullard RI, Ruby, and one of the Mesa spax7's which the Mesa fanboys will tell you are their normal tubes that are just tested and the lowest noise of the bunch. Apparently they're EHX, which are also the JJ's. I have a Sovtek 12ax7WA that's sortof it's own thing. The thing that I have to say instantly about the Mesa spax7 is that it cleaned up the hum and buzz on my Supersonic which is about as loud at Idle as most Mesa Boogies I've tried. More to come, but I'm pretty impressed with how much effect this tube made on this amp in particular. Anyone else try one?