[Elecraft] KPA100 problem

[W5EI@cs.com]

For the last couple of days when I power up my K2/100, the fan begins running 
immediately, and when I attempt to key the xmtr at more than 10 watts out, I 
get a PA hot report as well as high swr.  This is into a resonant antenna.  
The problem occurs when the heat sink is cold to the touch.  When I bring up 
CAL tpa on the menu, the heat sink temp shows very high readings.  I recently 
changed out the firmware for the KAT 100.  Do I need to do another temp. 
calibration?  If so, do I need to reset R6 fully counter-clockwise?  Thanks 
in advance for any suggestions.

73,

Don W5EI


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