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

[ersmar]

Vic:

The 259 analyzer is affected by mf and hf sigs and mfj sells an outboard tuneable filter. Check to see if their filter covers vhf as well.

73 de
Gene Smar AD3F

-------- Original message --------
From: Victor Walz   N2PP <n2pp at frontiernet.net> 
Date: 07/29/2016  12:01 PM  (GMT-05:00) 
To: towertalk at contesting.com 
Subject: [TowerTalk] Strong FM Station Impact on Antenna Analyzer Use in VHF 
 
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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