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RE: [TowerTalk] Wilson 5 element 20 meter monobander

To: "'Mark - AA6DX'" <AA6DX@ARRL.NET>
Subject: RE: [TowerTalk] Wilson 5 element 20 meter monobander
From: "Joe Subich, K4IK" <>
Date: Mon, 11 Oct 2004 11:06:27 -0400
List-post: <>

> From: Mark - AA6DX
> What a diff 6 feet make ... had a Wilson DB54 with 40 foot 
> boom, just was not as hot ..  

The Wilson DB54 was a dual band 20/15 (5 el/4 el) antenna.  As 
I recall the 20 meter elements were fairly evenly spaced to 
provide "room" for the 15 meter elements.  As I recall, the 
Wilson antennas also used gamma matches that were not the best 
ever designed.  

If it were modeled using modern software, I suspect the 20 meter 
section would be far from optimum and the 15 meter elements 
introduce destructive interaction. 

YO shows a relatively insignificant .5 dB increase in gain between 
optimized 5 element designs on 40 and 46 foot booms. 


   ... Joe, K4IK 


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