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Thanks Brian, I will check that when I get home. Yep 12AT7 in PI spot, I am just hoping I don't have an issue with the Output tranny. At least I am down to trouble shooting the output stage past the loop now. I have built a 5F6, 5E3, mooded Traynor YBA-1's fixed lots of other amps, but when I...

Interestingly enough, when I go from the loop out to a loop in on another amp, tons of volume, so I definitely have issues in the output stage.. I am going to pop some good EL34's back in and rebias again. The master was set full on, I have chased down the 15v rails, checked heaters, checked...

Hi All: I have a RG50TC opened up on my bench right now and it is puzzling me, all tubes have been testted and swapped out for known good ones, heater voltages check out, VDC on tubes 1, 2 VAC on 3,4,5,6. Plate voltages appear normal for a 6L6 AB amp. The gain channel has volume, not sure if I...