[Elecraft] [K2] KPA100 Temp Cal: Room temp or radio temp?

[Brian - N5BCN]

I may be wandering into nit-picky land, but I noticed using a hand held
infrared thermometer that the heat sink of the KPA100 is usually about 2
degrees warmer than ambient air temperature (when the unit has been sitting
idle for several hours).  For example, the heat sink will measure about 26
degs C and the room air temp is about 24 degs C.

For the purposes of the CAL tPA, which temp should I go with?  Or does it
really even matter?

Secondarily, when I discovered all this, I also found out that I had never
calibrated CAL tPA!  I was wondering why the fan NEVER seemed to kick on! 
So, I've been using the KPA100 for YEARS without the benefit of the fan.  I
hope I didn't cause any long term degradation of the unit.

Incidentally, it always seemed to get out at the proper power, but boy would
it get hot!

73,
Brian N5BCN



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