[TowerTalk] SWR Problem Balun or lightning protection?

[Tony]

On 12/21/2011 1:11 AM, Jim W7RY wrote:
> What kind of antenna is this Tony? 73 Jim W7RY

Hi Jim,

It's an M2 5 element mono band Yagi.

Tony, K2MO


>
>
> --------------------------------------------------
> 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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