schematics
Here are links to the relevant schematics. My upcoming discussion will refer to these.
https://schematicheaven.net/newamps/peavey_heritage_vtx.pdf
https://schematicheaven.net/fenderamps/deluxe_reverb_ab763_schem.pdf
final interconnection, first power test
Connecting the new circuitry to the VTX chassis. Most connections are through the 12-position "Euro" terminal strip, except heater power (to the left) which is hard-wired. First power-up, with no tubes inserted. LEDs ahoy! This just verifies that the +15V power supply is working, and I haven't made any grievious errors in the wiring. I verified that the channel-select 3-way switch works, turning on and off the yellow and green LEDs on the VTX, and the preamp-select 3-way works, turning on and off the white LEDs (yes, those are white, not blue as they appear in the camera). And I verified that the HV supply works, by taking it out of standby and observing that the blue LED of the RGB pilot light illuminates. (It's a bit dim with the 10M resistor though, I guess I need to decrease the resistance; gotta take care with the power dissipation...)
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