[TowerTalk] Antenna problem?

[Saad Mahaini]

what is the SWR of the radio into a known 50 Ohm Dummy load?



-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of K7LXC at aol.com
Sent: Thursday, October 06, 2005 10:46 AM
To: towertalk at contesting.com
Cc: W7FPChuck at aol.com
Subject: [TowerTalk] Antenna problem?

Howdy, TowerTalkians --

    I've got an antenna problem and I'm stumped. An M2 15M monobander 
developed some high swr - 3:1 or more where it used to be 1.1:1.

    I took a crane and man-basket up to the feedpoint and measured the swr 
with my MFJ at the balun; it was 1.2:1. I next measured at the jumper to the

tower - same thing. Then I measured the end of the feedline in the shack -
same 
thing. As far as I was concerned, the antenna system was fine.

    Plug it into the FT-990 and the swr on the rig was 3:1. Antenna tuner
was 
off. Add different lengths of RG-8, the swr varied from 2.5:1 to 5:1.  It 
doesn't seem to be wx related.  

    Like I said, I'm stumped. Any help out there? Solutions appreciated!

Cheers,
Steve    K7LXC
TOWER TECH 
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