When I first put my omni beacon antennas up several years ago I tweaked the
6, 2, and 432 loop stacks for low SWR near ground level---i.e. mounted to a
10ft mast. But when they went up on the roof my SWR appeared to be way off
on all three antenna sets. After the initial "panic-attack" I realized it
was the MFJ-259B hearing all the strong VHF FM broadcast and TV signals in
the area. The antennas were fine and using a standard SWR meter and TX power
confirmed that situation. I had the same issue with SWR measurements on
160m and AM broadcast signals a few years prior.....
Mike wa3tts
_______________________________________________
VHFcontesting mailing list
VHFcontesting@contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting
|