[Elecraft] [K3] internal 144MHz xvrtr - no output STRANGE BEHAVIOR

[mike]

I successfully replaced the antenna TMP jack on the K144XV and it seemed to
be working. However, I soon found while I had indeed repaired the jack, the
xvrtr would sometimes work and then at other times produce no output at all.
After some more controlled tests (change coax patch cables, cables, etc.) I
finally was able to recreate the problem at will. It turns out when the K3
is tuned to the 144 MHz band, the xvrtr works, displaying 10 watts output on
my external PWR meter. But as several seconds go by, it starts to lose
output until it goes down to zero. Left on the 2 meter band, the power never
comes back. But if I change the K3 to another band, say 3.5 MHz, in a matter
of a couple of minutes the xvrtr revives itself and I can get full output on
the 144 band again. Then it slowly loses power whether or not I am
transmitting. So just having the K3 on the 2 meter band causes the xvrtr to
somehow lose output, not even having to transmit.

I installed the K144XV in February of 2014 but never actually used it
because I never heard a signal on 2 meters CW or SSB in this area. I
recently installed a FM filter, and decided to start using the xvrtr on
local repeaters. That is when I discovered the problem.

Anyone else have this experience? I have reloaded the K3 (v. 5.50) and
K144XV (v. 104) firmware without any improvement. I am getting ready to send
the xvrtr to Elecraft. Any reason I should send in the K3 as well? The K3
shows no change in operation during all of this. Thanks 73  ..mike  AI6II



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