[Amps] Heat Measurement in Amps

[k7fm]

"Has anyone found a decent cheap temperature sensor/guage  (perhaps even at 
harbor freight, etc) that you could place at a specified location in the 
exhaust airstream of the tubes, of various amps to see and record what is 
"normal" temp ranges? "

I bought a dvm with a temp sensor - but it may have a problem around rf.  It 
should be possible to bypass and isolate the probe, then install the meter 
remotely.  Another solution is to use a thermistor and an analog meter set 
up as an ohmmeter.  You will need to calibrate that, but it would be rf 
immune.

73,   Colin  K7FM