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

[Gary]

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 at 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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