no schematics available online, not tough to draw this guy,
12AV6, 35W4 half wave rect, 50C5 good for 2 watts,
2N3711 is the preamp, they wanted a tremolo amp but told engineering to do it without adding a tube which would screw up the series string heaters, so they swap the AV6 from preamp to Trem circuit, add in 3711 transistor preamp to make the worlds first hybrid guitar amp, (maybe)
'starved plate" transistor circuit, 1 micro amp bias current, (see the 22 meg bias resistor) thought they stuffed 22 M instead of 2.2M but , we tried pushing more current thru the base but got distortion so i guess these guys had an inkling as to what they were doing, i guess as this was the same time period when we put a man on the moon with a 8086 processor,
collector current is 1/3 ma, so hfe= 333
big drop down resistor to get the 1/3 mil to kill volts so we dont exceed the 25 volt V-ce rating of the 3711,
not a lot of high end, tried different tone cap no luck, probably the 3000 turns on the EI 50 pri-sec OPT , but lo-fi is what this is about,
we ditched the 100K and the .005 death cap after installing the iso xfmr,
ac and dc voltages show,