How are you setting up the W8JI parallel resonant circuit?
I detune my 140 foot tower using the W8JI method because it was coupling into
my 160 m inv L. Works great.
I hang a wire from aboout 80 feet to ground and use a 1500 pF vacuum variable
that I can tune remotely from the shack - allows me to tweak the tuning as I
move up and down 160.
GL
73, Jeff W3KL
Jeffrey K. Okamitsu, PhD, MBA
+1-609-638-5402 US Mobile Phone
+1-240-421-0692 GSM Mobile Phone
________________________________
From: Mike Wetzel <mjwetzel@comcast.net>
To: towertalk@contesting.com
Cc: topband@contesting.com
Sent: Mon, October 4, 2010 5:51:36 PM
Subject: [TowerTalk] Tower Detuning
Dual posting Towertalk and TopBand.
I need to detune a tower that has 2 side mounted rotating 20 meter antennas
on it (not TIC rings but swing arms) (tower 170', boom 46'). I have tried
the sectionalizing method (from W8JI's website) but unable to make this work
so I was thinking the only other way is to do the 3 wire skirt method (NCJ
Nov/Dec 2005 WX0B article). With the rotating side mounted antennas does
anyone have any experience with how close to the tower the skirt wires can
be? Any other ideas that I might try to detune it?
The tower seems to be interfering with a new 8 circle (EFBS) 80 meter rx
array (f/b only 10db and pattern is not clean).
Thanks,
Mike W9RE
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