[Elecraft] K3/KPA500/KAT500 SWR problem

[Buck - k4ia]

I had a similar issue.  Drove me crazy.  Then one day I put my hand on 
the PL259 on my antenna switch and noticed it was warm.  Swapped out the 
90 degree connector on the coax and problem solved.  The high power from 
the amp must have been causing a fault in the connector.

Lesson 1.  Check all your connections.
Lesson 2.  Stop buying cheap coax connectors

Buck
k4ia

On 12/30/2013 2:13 PM, Ray Coles wrote:
> Forgot to mention that I hauled my MFJ wattmeter/dummy load out to the bush and pushed up 100 watts into it down the feeder with 1:1 SWR, which convinced me that at least my UR8 feeder is OK. Also didn't mention I hooked up my FG01 antenna analyser up at the shack and all seemed normal, but of course the problem only comes over 40 watts (which equates to a pre balun 500V). THE PROBLEM REMAINS and I am still mystified!
> 73
>
> Sent from my iPhone
> Ray Coles CEng M0XDL
> 10 Littlemoor Road,
> Weymouth DT3 6AA
> United Kingdom
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