[bridkarl]

Replaced the tubes. Powers up with about 40 watts usage. Zero audio. Going to start working backwards from the speaker. I’m starting with the assumption the audio transformer has an issue so I’ll use my ohmmeter and check the windings.
 Update 10/11

Spent about five hours today on this. Mostly
replacing bad rubber wiring. The wiring on the speaker was bad so replaced that. Also the audio transformer showed short so replaced that. General check of work to date, reflowing soldering, checking wires in right places.
Current status is it powers up. No audio except a very low hum. Volume and tone controls modify this hum so these circuits apparently work. 
Caps all replaced. Waiting on resistors to start checking and replacement.
Have an unmodified unit side by side on bench so that’s helpful. 
Bad volume control?? It’s been replaced at some point with this small random switched pot. Soneone just threw in a part.  Replacing with 2 megaohm linear Allen-Bradley pot so this is correct per schematic. 
Mostly cleanup work today. Making sure power supply caps are properly mounted and not just hanging in space.