[TowerTalk] 30m moxon

David Gilbert xdavid at cis-broadband.com
Wed Feb 7 17:07:20 EST 2007

You probably know this already, but L.B. Cebik -- W4RNL -- has written 
quite extensively on Moxon antennas 
(http://www.cebik.com/moxon/moxpage.html) and has generated design 
figures for various bands.  From what I've read, the trickiest part is 
getting the coupling (spacing, diameter) between the element tips just 
right.  Compared to a 2-element yagi, the gain for a Moxon is a fraction 
of a db less but the SWR and gain curves are broader ... and the 
front-to-back is much better.

Mechanical construction might be an issue, since you might need to 
stiffen the portion of the elements that point in toward each other.  If 
you use wire the weight of the wire will pull the main elements toward 
each other, and if you use tubing it can sag.  Take a look at how the 
excellent OptiBeam version for 40m handles it .... 
http://www.optibeam.de (click on "English", then "Antenna - Models", 
then "OB2-40M".

Dave   AB7E

Greenacres113 at aol.com wrote:
> Anyone using a Moxon on 30m? If so, any comments?
> k9il
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