[Elecraft] KPA100 power on 20m/30m, update

[Stewart Baker]

I had problems with HI CUR on 14 & 18MHz,  3.6 and 3.7 Amps respectively.
Changing C80 & C81 cured the problem, and I now have 2.9 and 2.4 Amps drawn.

73
Stewart G3RXQ

On Wed, 22 Jun 2005 10:36:20 -0400, Mike Markowski wrote:
> This is a follow up to my own problem for the sake of complete Elecraft
>
> archives.  :-)
>
> A few weeks back I mentioned having slightly lower power on 30m.  When
> the power knob was at its max, I had 97 W while all other bands were
> close to 120 W.  What I forgot to mention is that on both 20 m and 30 m
> I always got the HI CUR warning, though the warning threshold was set to
> 3.5 A.
>
> I recalibrated the PA and then got 100+ W on 30 m.  But a subsequent
> check a week or so later showed I was back down to 95 W into a dummy
> load.  Not a big deal, really, but I didn't like the HI CUR message and
> spoke with Gary at Elecraft about it.  He recommended changing the C80 &
> C81 caps.  After doing so, I no longer get the HI CUR warning.  In
> addition, I get slightly over 100 W on all bands rather than the nearly
> 120 W on most.  Whether that it's due to new caps or better calibration,
> though, I don't know...  I posted this followup because initially it
> seemed that a simple recalibration took care of the issue, but turns out
> I needed new caps like the other guys who were suffering from even worse
> side effects of their C80 and C81!
>
> 73,
> Mike  AB3AP
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