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[TowerTalk] finding resonant frequency of a shunt-fed tower for 160

To: <>
Subject: [TowerTalk] finding resonant frequency of a shunt-fed tower for 160
From: (Rick Bullon)
Date: Wed, 01 Aug 2001 03:04:57 +0000

>From: "Guy Olinger, K2AV" <>
>To: "WA9ALS - John" <>,   "TowerTalk" 
>Subject: Re: [TowerTalk] finding resonant frequency of a shunt-fed tower 
>for 160
To: <>
>Date: Tue, 31 Jul 2001 00:31:52 -0400
>I modeled that with the following assumption: that I would ground the 20
>meter ref and dir (only) to the boom which is grounded to the mast and
>then to the tower . This places the voltage peak out at the end of the
>longest and highest elements. That up 13 feet on a mast atop an 80 foot
>Trylon self standing tower models to a resonant frequency around 1.7
>MHz. I suspect in practice it will be lower than that, say ~1.6 MHz.
>Based upon that I'm going to bury a lot of copper around the Trylon,
>load it on 160 and deal with what crops  up.
>Guy Olinger
>Apex, NC, USA
I have buried lots of copper around here but I have never gotten a crop from 
I think there is a guy on here that claims to grow aluminum though. Can't 
get that stuff to grow here either :)

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