[Amps] Alpha 77 (8877) exhaust temp?

[Jim Barber]

All this talk about seals, temperatures and sensors has me wondering 
what would be a reasonable, conservative guessestimate of the maximum 
safe exhaust temperature on an Alpha 77? (single 8877, grounded grid)

I really need to rebuild the blower anyway; a potential project might be 
a temp sensor peeking into the silicone-rubber chimney and a small board 
with a uP and husky PWM fan speed controller. It would require 
converting the blower over to a (potentially larger) DC unit, but I've 
seen that done before. It could stand the addition of some rubber 
isolation gaskets while we're at it, too. (transmits a lot of vibration 
through my station desk)

Any thoughts?

Thanks,
Jim, N7CXI