[Elecraft] WA7U-KPA100(problem solved)

Sat Jun 22 14:15:01 2002

Found a bad connection between the KPA100 power cable and the power supply.
I was getting a voltage drop that was causing the problem.  Now getting 100
watts no problem.   Boy do I feel better.  Thanks to the list for all the
thoughts.  Todd
----- Original Message -----
From: "Todd Gahagan" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>
Sent: Saturday, June 22, 2002 11:44 AM
Subject: Re: [Elecraft] WA7U-KPA100


> Thanks Ron,  I'm using an Astron 50 amp supply.  Doesn't seem to sag much.
> I'm wondering about having possibly blown one of the 2n7000 transistors.
> Looks like that could be a possibility if I'm not mistaken.  Todd
> ----- Original Message -----
> From: "Ron D'Eau Claire" <[email protected]>
> To: "'Todd Gahagan'" <[email protected]>
> Cc: <[email protected]>
> Sent: Saturday, June 22, 2002 11:36 AM
> Subject: RE: [Elecraft] WA7U-KPA100
>
>
> > I seem to be having more than my share of problems with the amp project.
> > Everything checks out perfectly...Anytime I go over about 60watts the PA
> > shuts down and I get the High Reflected status in the K2 LCD.  It then
> > drops to an intermittent 35 watts power output.
> >
> > Thanks, Todd-WA7U
> >
> >
> > Is your power supply voltage holding up under the current load? I have
> > played with a KPA100 and noticed that it reported High Reflected on some
> > bands looking into a good dummy load. Turned out that the power supply
> > was sagging on some bands at 100 watts and that was fooling the amp into
> > reporting a High Reflected and shutting down.
> >
> > Ron AC7AC
> > K2 # 1289
> >
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>
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