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Re: [TowerTalk] Tower spacing

Subject: Re: [TowerTalk] Tower spacing
From: Pete Smith <>
Date: Thu, 18 Aug 2011 06:45:03 -0400
List-post: <">>
If you can get hold of it, there was a series of articles in NCJ a few 
years ago by K3NA that did some sophisticated modeling of inter-tower 
interactions.  I don't recall if he came up with some generalizations 
that might be helpful to you.

73, Pete N4ZR

The World Contest Station Database, updated daily at
The Reverse Beacon Network at, blog at,
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On 8/17/2011 5:35 PM, Larry wrote:
> I have 100ft (30m) tower that will have a 3 el 40M yagi and 80M rotatable 
> dipole on it. I am going to put up another tower (probably 70 feet, maybe 80 
> feet) for a log periodic array for 30-10M and probably a 6M yagi above log. I 
> am also thinking of trying to feed the 100 foot tower for 160M. I do not 
> recall seeing any discussions on spacing of towers. As far apart as possible 
> is probably the best advice of course. These are guyed towers so the guys 
> will dictate some amount of spacing. Any pointers to discussions about tower 
> spacing? Facts? Opinions (humble or otherwise)?
> I had thought about maybe trying to space them and feed them as array but I 
> don't think I have enough room for a 2 el 160 array with an appropriate 
> ground field. The towers will probably be in exactly a North-South 
> configuration which is not optimum for most places from here (Europe is about 
> 45 degrees, Asia closer at about 345 degrees, VK/ZL at 240 degrees,  Africa 
> at 90-110 degrees, and South America/Carribean about 150-200 degrees). I have 
> not tried modeling two different top-loaded towers yet (looks hard at the 
> moment). I need to spend some time with ON4UN's book but any thoughts on the 
> array scheme would be welcome.
> 73, Larry  W6NWS
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