A guy from my neighborhood brought up a possible trade for my 2011 Gibson SG 60s Special Tribute. He has a 1979 Fender Bassman 70 head. We fired it up in my music room and it has a bit of radio type noise. No radio channels came through but it's not really a hum. A couple of the pots need cleaning or replacement. I don't know the make of the power tubes yet. Gonna check those out tonight. It has one RCA tube in V1, two Fender tubes in V2 and V3 and a Telefunken in V4. I'm going to put in a Telefunken AU7 and some JJ ECC83S tubes. My gut is telling me to pass on the Fender unless he can sweeten the deal.