[TowerTalk] Reflector element question...

[john at kk9a.com]

Changing any element or spacing will effect the antenna pattern and 
impedance.   All of the elements work together to produce gain and F/B and 
if you wish to make changes, you should model the antenna first.   Random 
changes will likely make the antenna worse.  I have never operated 6m and I 
wonder why F/B would be important on that band.

John KK9A



To: towertalk at contesting.com
Subject: [TowerTalk] Reflector element question...
From: Geoffrey Way <wayg at cape-vision.com>
Date: Fri, 10 Sep 2010 16:14:12 -0400

I'm converting an old Moseley CL-33 tribander into a 6m beam.
It has a 12 foot boom, so I'm following the suggested layout in the
ARRL antenna book for a 5-element design shown on p. 18-27 of
the 2007 (21st) edition.

My question is, if I have some extra length on the reflector element,
would I get any additional front to back ratio if it were longer? And,
is there a length that becomes too long, having some adverse effect?
Or is it just a case of no further benefit? Perhaps some other effect
that I am unaware of?
-- 

             Geoff Way, KA1IOR