[TowerTalk] SWR Problem Balun or lightning protection?

[Jim W7RY]

Are you using the same wattmeter?  Or are you using the meter in each radio?

73
Jim W7RY


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From: "Tony" <dxdx at optonline.net>
Sent: Tuesday, December 20, 2011 9:12 PM
To: <towertalk at contesting.com>
Subject: Re: [TowerTalk] SWR Problem Balun or lightning protection?

> All,
> 
> 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 
> found that:
> 
> - 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 
> period
> 
> 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 ;  )
> 
> Tony, K2MO
> 
> 
> 
> 
> 
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