[Elecraft] KPA500 - Not Going To Full Power

[fyredude901]

Received my KPA 500 / KAT500 combo for Christmas.  Got them hooked up and
they were working like a charm and have for several days.   I am mostly on
digital and will typically run around 300 watts out.  I am using a Flexradio
6500 and my output on it is around 22 watts.  Today, I pushed the output up
to around 27 (which drove the amp over 310 watts).  At that time, the power
meter started surging (sorry, best way that I can think to describe it).  It
amp never went above 310, but it was like the power was being cycled on and
off to the unit.  The output was pulsing high and low.  When I backed the
Flex back down to 22 watts, and the output of the amp was 300 or less, this
issue stopped.  I am assuming it is the protection system for the amp. 
Still, I would like to know what the possible cause of this likely is so
that I can troubleshoot and fix it.  Any advice that can be provided would
be greatly appreciated!!

73
KD9EGK



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