You were correct, I had one black wire loose.
I have since switched out the output capacitors to Dayton 100uF 250V caps. Also installed the film capacitor to 12/13.
Voltage check following installation:
G and B+ check out fine. OA and OB both read 65V.
Is this OK? I haven’t used the amp yet.
If the range is about 75-100V at OA and OB, is the sound quality better if it falls between these numbers? Is the quality less if it’s a little less than 75?