The use of skirt wires is nothing new.
It's simply a variant of a shunt feed, as described in the old
handbooks.
It's a good technique, though.
In 1977, I used it to load a 500' FM/commercial tower on 1450KHz AM,
as well
as 1830 for contests. In that case, we had to use a second set of
skirts, to
decouple the upper portion of the tower--a shorted quarter wave works
wonders,
even when there's a 50' on a side, 500' tall tower.
N2EA
Message: 3
Date: Wed, 24 Sep 2008 7:23:11 -0700
From: Dennis <radioart@charter.net>
Subject: Re: [TowerTalk] (no subject) Vertical Antenna Instead ofTower
Decision....
To: Richards <jruing@ameritech.net>, donovanf@starpower.net, Don Hall
<donhall161@sbcglobal.net>
Cc: TowerTalk@contesting.com
Message-ID: <20080924102311.KS5J6.241140.root@mp12>
Content-Type: text/plain; charset=utf-8
A new technique for feeding towers has been adopted for Amateur use
from the broadcast industry. You drop 3 heavy gauge wires connected
at the top of the tower to within a few feet of the bottom. Connect
the three wires together with a wire ring around the base of the
tower and feed that ring, connected to the three wires, with a simple
L-Network with respect to your radial system.
Very effecient system. Several local DXers us it on 160m and 80m
with great results. One tower is 140' and the other I know is about
90' with a lot of top loading from various beams....
You can Google this type of tower feed and get more information....
Dennis, k0eoo
Jim Jarvis, MBA
President - Executive Coach
The Morse Group, LLC
732 548 5573 office 908 410 9130 cell
People-Process-Strategy: Achieving Results in a Changing World
www.themorsegroup.biz
coach@themorsegroup.biz
Read our latest newsletter. Go to: http://www.themorsegroup.net/
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