[Elecraft] KXPA100 Intermittent VSWR Issues

[Dan Baker]

Mine does the same thing all the time, so much that I do not like to using
the tuner any longer.
I confirmed it was tuner in the amp by operating into a dummy load. Its
does it into the dummy load on CW and SSB. I have not said anything,
thinking an update will be pushed out and the problem will disappear. In
the meantime I use the KAT500. Its all to frustrating to be in a QSO and
have it act up. It kind of behaves like the KAT500 did before they upgraded
the firmware. I am sure they will get around to taking care of it.

73,   Dan KM6CQ


I've run into several occasions where in mid-CW transmission my KXPA100
(with internal tuner) SWR takes a momentary jump from matched to maybe
3:1. I
see the SWR jump on both the KXPA front panel LEDs and on  the KX3 VSWR
display.  It lasts for maybe half a second, I hear  several clicks of the
relays in the tuner, and them it's back to normal. When  normal the SWR is
pretty
much 1:1 on the KX3, and the second green LED lit on  the KX3. I've not
seen it happen at the start of a transmission, but  rather several
characters
into a CQ or exchange..

In the ARRL 160 contest Saturday night this was happening perhaps once
every 2-3 minutes. I'm using a fairly well matched antenna - not random
wires.
I  also encountered this problem on 15 meters when operating from W1AW/8 in
WV  in October. In both cases I was running a pretty high CW duty cycle
while  running at a pretty good clip. The amp was warm, but the heat sink
air
flow is not blocked.

Any thoughts?


73  -  Jim  K8MR


-- 
KM6CQ
Dan Baker
www.km6cq.com
@danielbaker
DM09dn
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