Towertalk
[Top] [All Lists]

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" <k4ik@subich.com>
Date: Mon, 11 Oct 2004 11:06:27 -0400
List-post: <mailto:towertalk@contesting.com>

> 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. 

73, 

   ... Joe, K4IK 
 

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>