[Elecraft] WA7U-KPA100

Sat Jun 22 13:50:59 2002

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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