OK, if someone can explain why this happened and what I can do to prevent this headache in the future, I'd very much appreciate it.
First - I'm repairing a CS-80 here. Not a huge deal, just a lot of fiddly work getting to boards, etc. A guy I know has a CS-80 with a bad power supply. I told him to send it my way and I'll take a look at it. He has 2 SVU boards (contains most of the PS circuitry) - one is old, complete, but doesn't match any set of schematics we've ever seen. The other is in better condition, matches the schematics, but is missing some parts (looks like it was cannabalized some time in the past).
So, I decide to repopulate the newer board and go with that since the other one has definite problems. Also, since I have a working supply, I can crosscheck voltages, etc.
I put in new electrolytics, and use some NTE parts based on the cross reference guides (original parts were 2SA490 and 2SC828).
Everything powers up fine except the -6.5v is reading -12.5v.
I check the entire circuit and to make a long story a bit shorter, trace it down to the NTE transistors. I swap the power amplifier transistor (NTE 153) out for an original part from the old SVU board. The voltage goes from -12.5 down to -8.5. I swap out the transistor (NTE 199) for an original and the voltage drops to -6.35. A quick bump of the trimpot and it's a steady -6.5v
So, why would what NTE considers a direct replacement (no notes about swapping legs, etc) for both parts not work in the circuit?
For grins, I attached a section of the schematic showing the PS. The parts in question are Tr713 and Tr714.