[Amps] Wind! In series or parallel?

[k7fm]

"I also monitor the temperature of the exhaust air just to be sure the
fan does not lose power over time. On my amp, the max temperature
reached is about 195 degrees F. If it goes higher, I know the fan is
not doing it's job for some reason"

If you are running parallel tubes, you can also monitor the condition of the 
tubes somewhat by simply monitoring and comparing the exhaust temperature.

73,  Colin  K7FM