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[TowerTalk] RE: Antenna Separation

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Subject: [TowerTalk] RE: Antenna Separation
From: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Tue, 15 Jun 2004 21:10:24 -0400
List-post: <mailto:towertalk@contesting.com>
>How close can you mount VHF/UHF antennas without a serious negative impact?  
>Assume (for example) that I want to put the following antennas on one mast:
>   1) HF Yagi
>   2) 6m Yagi
>   3) 144MHz Yagi
>   5) 432MHz Yagi
>   6) 1.2GHz Yagi
One way to approach this is to look at what successful VHF contest rovers do.  
They place the antennas very close to each other sometimes inches.
www.qsl.net/n9rla    <http://www.qsl.net/n9rla>   has pictures of several rovers
user.adelphia.net/~w3iy/fstack.htm   has done modeling of closely spaced stacks.
Some successful vhf fixed contesters also have fairly closely spaced stacks of 
yagis.
For EME,  every fraction of a db counts and the above may not be good enough.
Walter, K1CMF,  Ashburnham, MA  FN42bq
 
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