[TowerTalk] FW: Custom antenna design

David Gilbert xdavid at cis-broadband.com
Tue Sep 17 17:12:53 EDT 2013



Just guessing here, but a coil loaded Moxon might work.  It probably 
wouldn't provide a lot more gain, but if it worked it would have a much 
improved pattern.  Moxons rely on coupling between the folded tips of 
the forward and rear elements, though, so I suspect such an antenna 
would involve a bit of trial and error to optimize it.

73,
Dave   AB7E


>
>
>
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
> Charlie Gallo
> Sent: Tuesday, September 17, 2013 1:02 PM
> To: towertalk at contesting.com
> Subject: [TowerTalk] Custom antenna design
>
> Hey Gang
>
> OK - here is a question - anyone out there doing custom beams?  I have kind
> of a sticky
>
> Right now I'm running a Force 12 D-140, frankly because that all that will
> FIT - I have a 38ft piece of property, and it has an 18 ft turning radius
>
> I'd LOVE to have a bit more gain, but even the smallest shorty 40s I've
> found are SLIGHTLY too big.
>
> I was wondering if anyone could design a 18.5 ft or less turning radius 40m
> beam...



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