Thanks for the pics Greg....
I finished installing the parts on this amp and did a slow power up. So far, the dc voltages look ok. Good thing I had an extra Rectifier tube! The original couldn't produce the expected dc on the Cathode (350vdc).
Of the two channels, Channel 1 (Mic or Instrument) is working the best. But I don't think I'm getting the output that I should. I'm working with old pre-amp tubes and need to convince the owner we should swap those out.
Channel 2 has some issues... there is some oscillating and other noise when I turn up the volume. I'll deal with that later.
For now, I want to work on Channel 1 - replace 12AY7, 12Ax7, and drop in some new 6V6 tubes.
As for the output transformer, I have read in other threads that the OTs on the older Gibson's are problematic. I'm wondering if I could use something like a Classictone 40-18045. It has an 8 ohm tap rated at 15 watts.
Ok.. it will be a stage by stage analysis!