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[TowerTalk] RE : Wind generators/towers and antennas

To: "'Jim Lux'" <>, <>,<>
Subject: [TowerTalk] RE : Wind generators/towers and antennas
From: "hermans" <>
Date: Mon, 3 Jul 2006 00:11:42 +0100
List-post: <>
No experience at all in this matter.
But just one question, what about the near RF field when some metal or other
propellers are turning close tothe airial.
Wouldn't that produce a flutter on received signals ?
Just a stupid queqtion....

Jos on4kj

-----Message d'origine-----
De :
[] De la part de Jim Lux
Envoyé : dimanche 2 juillet 2006 23:33
À :;
Objet : Re: [TowerTalk] Wind generators/towers and antennas

At 01:18 PM 7/2/2006, wrote:
>I am in the midst of designing a new station for KH6 and it appears I 
>may  be putting up some Rohn 55 as a support for a wind generator to 
>provide electric.
>It certainly would be a shame to let a good 60-90 foot of tower be 
>wasted  on just that and the thought occurred to me that the tower 
>could be  used as a support for wire antennas as well as possibly 
>side-mounted  Yagis.
>Has anyone had experience with mounting antennas on the same tower as 
>wind generators?  If so, what was the experience with RFI on the
>antennas?   And if
>not on the same tower, has anyone had experience mounting antennas  
>anywhere near the wind generator and what, if any RFI was noticed?
>KH6 law restricts hams to one 90 foot tower

You might want to check on the ham-law reflector, but I suspect that a flat 
restriction to one tower would not comply with the PRB-1 requirement to 
"reasonably accommodate".  What if you wanted to build a 80 meter phased 
array, with 1/2 wave verticals?

  In a somewhat similar situation with OTARD antennas (dishes etc), someone 
put up 5 poles and I don't recall how many dishes, the city said no, you 
only get one, the courts said, uh uh, the premption doesn't work that way, 
you have to allow whatever the person wants unless you can articulate a 
specific historical preservation or safety concern.

OTOH, you could be in the delightful(?) position of having the law on your 
side, but needed to spend many tens of kilodollars to prove it.

The tower for wind generator idea is a clever one to get around it.  And, 
of course, is there a requirement that you have to have your windmill 
actually generate any electricity in any significant amount (assuming you 
don't want it for power, although a wind generator is a nifty idea in and 
of itself).  Perhaps a suitable clutch arrangement to keep the generator 
from turning (although the prop still does) and making noise when you're on 
the air? Or, can you use the windmill for pumping?



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