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[TowerTalk] Strong FM Station Impact on Antenna Analyzer Use in VHF

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Subject: [TowerTalk] Strong FM Station Impact on Antenna Analyzer Use in VHF
From: "Victor Walz N2PP" <n2pp@frontiernet.net>
Date: Fri, 29 Jul 2016 12:01:33 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I have two antenna analyzers:   MFJ-259 and Rig Expert AA-230PRO.

 

I am having trouble obtaining resonance (low SWR) at 144 MHz with 2
commercially made 144 MHz yagis.  I am wondering if both antenna analyzers
are being adversely impacted by a 50 KW FM station on 107 MHz located about
0.5 miles away.  The antennas are being tested at 35 ft out in the open
supported by a tram.

 

Does anybody have any experience with this?

 

My next step is to use a 2 meter HT and an SWR bridge which will probably
answer this question, but I am interested in whether this is a typical
problem with these antenna analyzers.

 

Vic  N2PP

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