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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