Well, I had a relay fail on my KAT3 board. I don't remember which one. Elecraft sent me a replacement. It wasn't hard to replace, but it happens.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 4 May 2017 16:46, Don Wilhelm wrote:
Olaf,

The relays used by Elecraft are quite reliable, so I suspect that is not
a reasonable source of the problem.  In more than 12 years of repairing
the Elecraft legacy gear (more than 1200 repairs), I have had to replace
only a small handful of relays due to failure.  I have replaced several
where the builder has distorted the case with a soldering iron.

I would double and triple check the SUBIN and SUBOUT connectors.  A
connector failure is much more likely than a relay failure.

You might contact K3support to see if they have encountered a situation
like yours before.

73,
Don W3FPR

On 5/4/2017 3:31 AM, la3rk wrote:
I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA,
antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at
the same
time power out goes to zero.
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