[Elecraft] KPA 500: No Output

[Lyn Norstad]

Dave -

Looking at your very nice website and the "Radio-end station setup," I'm
wondering why you are using an external antenna switch?  In my experience,
especially for remote operation, you'll generally have a much more
fool-proof installation using the KAT500's internal antenna switch.  The way
you're doing it, the KAT has no way to know which antenna it is supposed to
be matching - and thereby could lead to many problems - including damage to
the finals.

73
Lyn, WØLEN


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of dave ingebright
Sent: Tuesday, December 13, 2022 9:47 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA 500: No Output

Hello-- I have a 3 yr old KPA500 that has just exhibited it's first problem.
No amplification! I am remote controlling it via the remote client over the
internet from 2000 miles away. Nothing has changed in the remote shack and
no wiring has been disturbed. There is no output from the KPA on any band. I
can see the 72 Volt B+, and the temp of the heatsink, and I can control the
fan speed, so I have control of the unit. The client shows the exciter power
through the amp and the SWR. There are no alarms and I have hit alarm reset
and had the power plug pulled and reset.  I'd guess the PTT line is somehow
open but... asking if anyone has had a similar problem.
tnx de dave
WB7ELY
My KPA500 page: https://www.valhallatreefarm.com/WB7ELY/kpa500/kpa500.htm 
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