Scored a pristine '61 6G4 (A handwritten On tube chart and circuit is 6G4-A) brown Super. Original down to the Amperex Bugle Boy 7025's and Astron Mini-Mites. Original Tung Sol Power tubes. As you can see it has a non-original power transformer. A 6516 Triad, if I'm correct - a tweed Twin and Pro transformer. The original must've bitten the dust early on and this was available. It has no center tap so there are two resistors coming off filament pins on the first power tube to ground on chassis. Really cool. I immediately broke original power cord when unplugging it (it got stuck in outlet!?!), so a 3 prong got installed and ground switch and death cap bypassed. So much for going to the museum. Anyway - just pumped about this score. Amp sounds amazing - trem is a bit weak. One Tung sol was shot, and replacing it brought amp to life. Previous owner bought it off original owner who never played it much. Will this incorrect power transformer work correctly? I see no sign of original failing having taken anything out, or how the previous one was wired in. Was Fender ever known to use up old transformer parts from the parts bin in newer amps? This amp has a mix and match of Astrons and Blue molded caps. Weird. Anyone know specs on this PT? Voltages are 460v with tubes at about 28ma. I thought the 6516 was a stand up type transformer. Any info here appreciated on this unusual power transformer. Amp sounds good! Readings are all bang on.