Hank, check the grounding of the SO239's. I believe the path is through
some hardware. Also don't absolve the patch cables too quickly.
On 13 Mar 2015 06:30, Hank Garretson wrote:
For the past few months, I have had intermittent receive de-sense with my
K3/100-F, Serial 1523. Firmware 5.14, 2.13, 1.19 installed this week, but
de-sense was there with previous firmware.
Intermittently receive sensitivity will drop about ten dB. Usually happens
after transmitting, but sometimes happens spontaneously with no
transmitting. A dit usually restores sensitivity. If I don't dit,
sensitivity randomly restores itself.
CW, SSB, RTTY. All contest bands. (Don't do WARC.)
I have one-by-one eliminated my BCD antenna-switches, my ACOM amplifier,
and my antenna/dummy load switch. With these items in or out of line, I
still get intermittent de-sense.
Which leads me to believe the problem is with the K3 itself. (It could be
one of my coax patch cables, but I suspect not.)
KXV3 installed, but use ANT1.
SUB installed. Intermittent de-sense with and without SUB engaged.
Suggestions?
73,
Hank, W6SX
--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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