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Re: [TenTec] New and Improved Terminology (NVIS origins)

To: tentec@contesting.com
Subject: Re: [TenTec] New and Improved Terminology (NVIS origins)
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Reply-to: geraldj@weather.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 10 Jan 2011 19:42:46 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
The wire elements in the Hex Beam and Spideream surely vibrate in the 
wind, on power and phone wires its called Aeolian vibrations, most 
prominent at light winds. http://www.uh.edu/engines/epi1653.htm 
describes it in more detail.

73, Jerry, K0CQ


On 1/10/2011 7:18 PM, Rick - NJ0IP / DJ0IP wrote:
> Or build the antenna from the start in a way, such that it inherently
> supports itself.
> 2 examples:  Hex Beam and Spiderbeam
>
> 73
> Rick
>
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Stuart Rohre
> Sent: Monday, January 10, 2011 7:20 PM
> To: tentec@contesting.com
> Subject: Re: [TenTec] New and Improved Terminology (NVIS origins)
>
> Another fix for "strumming" of beam elements is to fill them with poly
> rope.  The whole idea is to change the resonant frequency to stiffle
> vibrations.
>
> -Stuart Rohre
> K5KVH
>
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