[Elecraft] kpa 100 PA hot ??? & no power out

[W3FPR - Don Wilhelm]

Bill,

Check the menu entry for CAL tPA - it should be set to the same temperature
as the transistor cases in degrees C.  If you let things cool down to
ambient (long enough so everything is at the same temperature, you can set
it properly.

I really don't know what is going on here because I have never experienced
it and never had an opportunity to analyze it, but baed on what some others
have said, it usually results from operation under some 'adverse conditions'
such as might be found on Field Day or portable operation - so my guess is
that it may be related to some spike that comes in on the power supply line
or maybe something entirely diffeerent, but bottom line judging from the
reports I have heard about, it occurs seldom in a home station environment,
and most of the occurrances are related to portable operating conditions -
of course my suppositions on this have yet to be substantiated.

73,
Don W3FPR

> -----Original Message-----
>
> with only about four hours to go my k2/qrp //- EC2 KPA100/KAT100
> developed
> a  problem.  "PA HOT",,,and locked into xmt.  Had to power down to get it
> out of xmt.  BUT THE PA was NOT hot... not even close,,,,over the
> course of
> field day it never really got hot  (this was a gota station with good
> dipoles)......
>
> The k2 when disconnected from the kpa/kat100 appears at first
> testing to be
> ok,,,, but the 15 watts didn't cut it for the last four
> hours,,,,as a gota
> station.
>
> I looked in the book... but until I put a meter in there I'm clueless.
>
> it will not develop any power from the amp.The k2 is good at 15 watts...
> It was developing only about 50 60 watts out on 20 before it went down....
> ( and i just ordered the 20/30 mtr mod kit ),,,,
> was it always low on 20 ...i do not know...
>
> And of course I leave on a car trip for 6 days,,,in half hour. Guess I'll
> have to find a wifi  hotel to park at &  to look thru the archives... ..
>
> maybe someone has been here before?????
> bill  ny9h....
>
>
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