[Towertalk] TH-7 boom to 40 meter rotatable dipole

[EUGENE SMAR]

Don:

     I printed a copy of the referenced web page.  Thanks for the info.
Could you explain the purpose of the Allen-Bradley SLC-500 and where you got
it?  It seems like this is an especially important component for using the
stepper motors.  Thanks again.

73 de
Gene Smar  AD3F
-----Original Message-----
From: K4BEV@aol.com <K4BEV@aol.com>
To: Towertalk@contesting.com <Towertalk@contesting.com>
Cc: TCG@K4RO.NET <TCG@K4RO.NET>; CQ-Contest@contesting.com
<CQ-Contest@contesting.com>
Date: Sunday, June 09, 2002 9:26 AM
Subject: [Towertalk] TH-7 boom to 40 meter rotatable dipole


>Several of y'all had asked me to keep you informed on my TH-7 boom
conversion
>project.
>Kirk, K4RO, had modified his tribander with an Omega match per N4KG's
design
>and reports not only fine results, but even better, higher contest scores
on
>40 meters. With Kirk's encouragement I set off to duplicate this antenna. I
>have a crank-up tower, so could not tune the antenna at it's operating
>height. Tuning it with the tower cranked down proved pointless. The
resonant
>frequency changed drastically when extending the tower. I've finally found
a
>solution to the problem which not only lets me tune the antenna to 1:1
>anywhere on 40 with the tower extended, it also gives me a 1:1 match on 30
as
>a bonus.
>My description of the antenna, with photos, can be found at:
>www.k4ro.net/tcg/k4bev_boom/k4bevboom.html
>
>Also: If you haven't checked out K4RO's fine Tennessee Contest Group web
site
>it's at:
>www.k4ro.net/tcg.html
>
>GL es 73,
>Don - K4BEV
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