thanks for chiming in, Doug. And just how do you go about finding this little culprit? I have a scope, although as noted i don't pretend how to use it yet. Today I removed several tiny caps and measured them with the adapter on the DMM, but everything I measured compared similarly to those on the right side. I still have a 000.0 reading on the left bias, and I've tried to go over every sinlge component on the left to make sure it was identified and installed properly. I am sad to say they seem to be. What about the differential input? Is there a way to test it in place? It's the only thing I can't "see".
So - more questions. Does the unstable voltage at Qe15 Base and Qe21 C. mean oscillation? The hot heat sink would suggest that.
Could it be that having all new (modern) transistor equivalents, (except the differential pair,) creates new gain or voltage situations not suitable for the original schematic values? I have'nt read about anyone replacing every tranny yet. Maybe it's too much?
Where else can the fault be hiding? I used 6800uf mains, not 10,000uf. I used AK approved components, not 'think-it-will-work's, and I work one piece at a time, comparing the original to the replacement to the schematic to the notes. So it's frustrating to think it is correct and something is very wrong. I want to find a backwards transistor or electrolytic. I want to find a bad solder joint. I want to find silkscreen errors - oh, I did! Under the main power board the pins 7 and 8 are labeled backwards. It's the 28v B+/-. My wiring was correct, the silkscreen printing was wrong underneath.
We can overcome this! There must be some systematic approach to use that will find the issue. I just don't know what to do next. Back to the scope videos...(thanks dr!)