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Re: [TowerTalk] How high is enough

To: towertalk@contesting.com
Subject: Re: [TowerTalk] How high is enough
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Tue, 30 Jul 2013 19:57:12 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 7/30/2013 7:46 PM, Jim in Waco wb5oxq wrote:
When choosing a height for a beam is 1/4 wave above ground at the lowest frequency 
enough?  1/2 wave?  I see Force 12 rating the gain on their beams at 74'1".

The best answers to your question are in the ARRL Antenna Book. It's a real bargain, especially because it includes a CD with a starter version of NEC, a nice program that computes loss in transmission lines, a Yagi modeling program, and HFTA, which helps answer the question you just asked.

73, Jim K9YC
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