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Re: [TowerTalk] Looking for a Short Rotatable Dipole or...

Subject: Re: [TowerTalk] Looking for a Short Rotatable Dipole or...
From: Gary <gary_mayfield@hotmail.com>
Date: Thu, 28 Apr 2016 19:51:26 +0000
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
My dad has a Delta-C140 from F12. He has been quite happy with it. 

73,
Joe kk0sd

Sent from my iPhone

> On Apr 28, 2016, at 12:10 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
> 
>> On Wed,4/27/2016 11:31 AM, Eric Rosenberg wrote:
>> I''m looking for a 40m rotatable dipole (preferably a F12 EF-140S) to add to 
>> the C3-SS on my roof.
> 
> Eric,
> 
> How about a vertical on your roof with radials? Both could be wire. The 
> vertical wire could be mounted to a fiberglass mast like this. 
> http://www.qsl.net/dk9sq/ Or do telescoping Al tubing and guy it at the top.
> 
> The radials don't need to be perfectly at right angles, and you don't 
> necessarily need four -- three would work pretty well. Mounting it on the 
> roof greatly reduces ground losses and improves the vertical radiation 
> pattern. See my modeling study of this that ran in NCJ last year.
> 
> http://k9yc.com/AntennaPlanning.pdf
> 
> 73, Jim K9YC
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