[Elecraft] [KX3] Unstable SWR reading

[Jim Bennett]

The only time I see that sort of fluctuation is at home, when it is raining. I'm using 450 ohm "ladder line" to feed an 88-foot long doublet, 45 feet up. Prior to the rain coming down, I can press Tune and get a great match on any band, 80-6 meters. When the rain starts up, my SWR jumps up to 2.5:1 or more. That 450-ohm stuff has to go. Are you operating in rainy conditions, or with that stuff?

Jim / W6JHB

On   Monday, Mar 31, 2014, at  Monday, 10:02 AM, Gary Hawkins wrote:

> On my last two portable outings I've noticed that after a few QSOs I start to get unstable SWR readings, with the radio reporting fluctuating SWR ranging into the 2 and 3's.  I'm using a tuned antenna, plus pressing the ATU button results in 1:1 matching. Everything is fine for a while and then the SWR reading go unstable midway through the QSO.  Pressing the ATU button seems to resolve the problem for a while but it starts up again.  I realize it could be a problem with the cabling or antenna but visual inspection seems to indicate everything is fine and so far I've not been able to replicate the problem on the bench.  Has anyone seen this type of problem with the KX3?
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