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[TowerTalk] OCF and 160m?

To: towertalk@contesting.com
Subject: [TowerTalk] OCF and 160m?
From: "Eugene Hertz" <ehertz@tcaf.org>
Date: Wed, 04 Oct 2006 16:23:33 +0000
List-post: <mailto:towertalk@contesting.com>
Hello all,
ok: I got a real bender for you experts and modelers out there (I am neither!).

I have two trees on my property. They are 195' apart. I am thinking of an OCF 
dipole with 45' and 90' legs with a 6:1 autotransformer at the feedpoint 
connected to 50 ohm coax (buckmaster style).  This nicely brings the feedline 
directly over my shack.  But, I have lots more length available to me to the 
far tree that is going unused.

I was thinking of a way to use that space for 160m instead of rope.  Here's my 
thought and could someone tell me what I'm smoking or if it may be feasible?

Do you think it might be feasible to place an 80m trap at the end of the longer 
leg of the ocf, and extend a wire beyond the trap for 160m. The idea would be 
to use only one of the coax conductors against a radial field for 160, but use 
the antenna as a OCF using both conductors for 10-80?

In that way, I can get both a balanced 10-80 meter ocf AND an inverted L 
unbalanced antenna for 160 using the same installation (not at the same time, 
of course!) Any one know what the existance of a trap and extra wire beyond the 
trap might affect the OCF performace when being used as a regular ocf?

Just wondering your thoughts. I will add that several folks have reported 
excellent results with the carolina windom, but I do not mention that here 
because it has som other baluns involved that might complicate any 
calculations/modeling of the idea I have above.  So I have listed the simpler 
buckmaster just for ease of discussion.

Thanks!
Eugene




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