[TowerTalk] 'new' technique for feeding towers.

[jim Jarvis]

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 at charter.net>
Subject: Re: [TowerTalk] (no subject) Vertical Antenna Instead	ofTower
	Decision....
To: Richards <jruing at ameritech.net>, donovanf at starpower.net, 	Don Hall
	<donhall161 at sbcglobal.net>
Cc: TowerTalk at contesting.com
Message-ID: <20080924102311.KS5J6.241140.root at 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

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