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Topband: AA6TT finally moves to Vermont; 160m 4-square question

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Subject: Topband: AA6TT finally moves to Vermont; 160m 4-square question
From: gmguerin@voyager.net (George & Marijke Guerin)
Date: Sun, 24 Jun 2001 09:53:00 -0400
Hi All,

Denny's solution has merit.  It got my brain going again.

Consider top loaded towers, using either the guys or top hat that would make
the individual elements come out about 25 ohms.  That may mean 105 - 110
feet tall.  With the quadrature feed available commercially, and 1/4 wave 50
ohm coaxial lines to the phasing box, each one comes out at a theoretical
100 ohms at the phaser.
That really works best for individual towers, as the four tower array will
have impedances all over the place as demonstrated many times.  However the
top few feet of a tower is not going to help the radiation, so some guy wire
loading will save some effort.  You might actually get away with only three
sets of guys as well, if you use ten sections plus loading, guying at 33, 66
and 99 feet.

Have fun Bill, sounds like a good project

73        George        K8GG



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