I bypassed the lghtning protection and the SWR problem is still there. I
installed a new coax connector on the shack side of the coax as well.
I still have to check the balun, balun leads and the coax-to-balun
connector. There's nothing else inline. The coax (Bury Flex) and balun
(3KW M2) were installed a few years ago.
I just checked the system again with two different 100 watt rigs and
- I can transmit for 2 or 3 minutes from a cold start before the SWR
starts to rise
- the SRW returns to normal 30 seconds after I stop transmitting
- it takes a lot less time for the SWR to rise after the 30 second rest
I did replace the ground wires with copper strap a few months ago, but I
haven't made any other changes to the tower and antenna system.
Why do these things always happen during the winter ; )
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