Ampeg B2 test points and bias

[pontiacpete]

Hi all, I just finished rebuilding the output of a B2 and I have a couple of questions regarding the TP voltages. With a 1v signal in on pin 2, no load, TP7 and 8 measures 5.8 and 5.2vdc. And on TP9 and 10 there's 38vac on each and 2vdc apiece.
The 38vac and 2vdc are low compared to the schematic, is there a problem here?

Also, is it better not to bias until the mosfets are mounted to the heatsink? I'm find that the 27mvdc or so is going up as they get hot.

thanks!

[Enzo]

Um, you are operating the amp with the outputs not heatsunk? NONONONO!!! They will fry themselves. Like running a car engine without the radiator connected.

[pontiacpete]

Many Thanks Enzo!! Close call. I probably would have fried them if I didn't post here and continued on. Anyway, they survived.
Put the board back in and marked the board with sharpie at the test points and pulled the small AC board to read the 2 mosfets that lay underneath.
I biased them to the average 25mv.
The amp plays fine. I'm still a bit concerned about the 38vac 2vdc on TP9 and 10.
Is there a problem with that?