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[TowerTalk] Why does Cushcraft R7 work so well withoutradials?

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Subject: [TowerTalk] Why does Cushcraft R7 work so well withoutradials?
From: (Joe Reisert)
Date: Mon, 12 Mar 2001 10:29:48 -0500

I can only speak for the Cushcraft R7. It is a compromise 7 band 3/8 
wavelength (electrically) vertical that uses 7 radials each 49" long that 
act as a counterpoise for the lack of a ground system. The entire structure 
is tuned. If you hang on any new radials, modify them or add an external 
ground etc., you'll immediately de-tune the antenna and you're on your own! 
These radials are a compromise between cost, space limitations etc.


Joe, W1JR

At 09:42 AM 3/11/01 -0800, michael watts wrote:
>Hello TowerTalkers,
>The Cushcraft R7 and R8 verticals seem to work pretty
>well.  They use 8 "whiskers" that are about 3 feet
>long as the ground plane.  Why does this work so well?
>  Would it work better if the whiskers were real
>radials?  Would making the whiskers twice as long
>improve the performace?
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