[TowerTalk] Omnidirectional Antenna Installations (Specifically) and Lightning

[ersmar at comcast.net]

Roger:

     Those folded dipole are INTENDED to be used in front of a reflecting 
steel support pole, etc.  They provide a directional pattern using this 
reflective material as a passive part of the radiator.  I had suggested that 
Ben consult with  CC's engineers for additional advice; I'm sure they have a 
solution for this type of distributed mounting in their idea Rolodex. [tm 
for you purists out there.]

73 de
Gene Smar  AD3F


----- Original Message ----- 
From: "Roger D Johnson" <n1rj at adelphia.net>
To: <towertalk at contesting.com>
Sent: Monday, July 03, 2006 1:48 PM
Subject: Re: [TowerTalk] Omnidirectional Antenna Installations 
(Specifically) and Lightning


> ersmar at comcast.net wrote:
>> Ben:
>>
>>      My recommendation would be to use four DC-grounded folded vertical 
>> dipoles spaced around the perimeter of the water tank, and fed with the 
>> appropriate phasing harness.  Check out Cushcraft's commercial antennas 
>> such as 4504P at http://www.cushcraft.com/ (click on land mobile/paging 
>> and follow through to their VHF and UHF arrays.)  You might be able to 
>> get some technical assistance from their engineers on phasing harness 
>> design for your specific app.
>>
>> 73 de
>> Gene Smar  AD3F
>
> I think reflections from the tank would wreak havoc with the
> pattern using omni antennas.
>
> 73, Roger
>
>
> -- 
> Remember the USS Liberty (AGTR-5)
> http://ussliberty.org/
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