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Re: [TowerTalk] Detuning my Tower

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Detuning my Tower
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sun, 20 Sep 2020 21:01:13 -0700
List-post: <mailto:towertalk@contesting.com>
On 9/20/2020 5:04 PM, Robert Harmon wrote:
Can you point me in the right direction for information on how to do this.  Is 
there an easy way to check the tower for resonance ?

I haven't done what you're asking, but it's pretty easy to get a ballpark estimate with a simple NEC model. Take the tower diameter into account (if triangular, 0.6 of the face is good enough), and add in any aluminum that is attached to the tower (but not insulated elements). Use the simplest form of NEC model of a vertical with the base going to ground, the generator in the first segment. Use the Real/MiniNEC ground type.

73, Jim K9YC


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