Last week I asked for input regarding antenna analyzers because I was
convinced that something was wrong with my MFJ. I kept getting erratic
readings on a 80M dipole I put up. AD4J and K4SB suggested that I first
make sure that the erratic readings were not caused by a nearby AM radio
station. AA4LR also mentioned that possibility. As it turns out, that was
the problem. My QTH is approximately 4 miles from the antenna complex at
Holcomb Bridge and Spalding Drive. AD4J says his QTH is only 2 miles from
that location and he has to use a MFJ filter on his analyzer in order to
get accurate readings. This weekend I used a 80M band pass filter on the
analyzer and that took care of the problem. In addition, I discovered that
the readings I had been relying on for 40M were bad also. So after a
weekend of tweaking my wires are 1:1.
If you are in the area of an AM transmitter, take heed.
Thanks Jim, Ed and Bill!
73,
Jay/K4OGG
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