here is a schematic of the tube circuit and pwr supply,
this version has no 1M gain pot,
LM 317 values were re-calculated and have not been proven yet in the real circuit,
so i put question marks by them until further notice, let me know if you have values that work good and i can pencil them in,
voltages and xfmr info has also been added thanks to Dirty Larry,
Sec DCR is probably right, they made it higher than a standard 600 ohm xfmr probably to get the pot to work better, it has an easier time dragging down a higher DCR as the voltage/current source will not be as stiff as say, a 11 ohm sec,
also, more sec DCR means smaller wire which means better high end response as capacitance will be less due to less copper acting as a plate of a capacitor,
if you go back and look at the xfmr pics, you can see a lot of space left on the bobbin, which also indicates smaller sec wire
there were some AC voltage measurements taken by Larry from pins 1 to 2 and 1 to 3 o the output XLR, but these were not included as the transformer would isolate these signals and therefore they are of questionable character,
note that this amp "plays out of phase" like a Marshall but we can flip the polarity back to in phase with the output transformer, this can possibly be important if recording with two signals,
oh, and Merry Christmas!
