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[TowerTalk] Moving Resonance of Dipoles

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Subject: [TowerTalk] Moving Resonance of Dipoles
From: n2mg@contesting.com (Mike Gilmer - N2MG)
Date: 14 Nov 2001 07:44:27 -0800
You will, however, make your coax "hot" (or "hotter) 
making the use of a choke/balun even more important.

The ARRL Antenna Book has some words to say about "Off 
Center Fed" dipoles.

Mike N2MG


On Wed, 14 November 2001, Pete Smith wrote:

> For most of my ham career I thought that a dipole had to be symmetrical --
> which will tell you how technically competent I am.  Then I read about the
> good results that W2UP and others had adding length to just one side.  I
> was curious about the quantitative side of this, so I modeled a
> symmetrical, resonant dipole in free space at 3.5 MHz (actually 3520), then
> removed  wire from one end to move the resonance all the way to 4.0 MHz.  
> 
> feedpoint at 3.520 MHz -- 71.9 +j .1  (66.75 feet of wire either side of
> center)
> feedpoint at 4.0 MHz -- 72.8 +j 3.6 (51 feet on one side, 66.75 on the other)
> 
> QED  
> 
> 73, Pete N4ZR
> www.qsl.net/n4zr

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