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Re: [TowerTalk] Radial Ends Buried???

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Radial Ends Buried???
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Fri, 18 Nov 2022 14:10:27 -0800
List-post: <mailto:towertalk@contesting.com>
On 11/18/2022 1:28 PM, Wes wrote:
By serendipity, I measured the input impedance of one radial against all of the others and it's resonant at 1.84 MHz.

About ten years ago, I did the experiment of modeling a pair of radials cut to a free-space resonance, starting with them as close as NEC2 would allow it, and raising them in small increments to several feet. VF with that closest contact was about 0.7. By 3-4 ft, was close to free space, taking the #14 THHN jacket into account. I also did some measurements of THHN #14 pairs laying on the ground, but don't recall the result.

73, Jim K9YC
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