[TowerTalk] yagi f/b and rx s/n

[john at kk9a.com]

You can easily design a 2el monoband yagi with 50 ohms impedance and 
reasonable gain.  Trying to design one for multiple frequencies using a 
fixed boom length is more of a challenge.  I always focus my designs on gain 
first and then SWR and F/B.  If you really want good F/B you'll have to add 
another element to your beam.

John KK9A


To:Tower Talk List <towertalk at contesting.com>
Subject:[TowerTalk] yagi f/b and rx s/n
From:Barry N1EU <n1eu.barry at gmail.com>
Date:Sun, 13 Jan 2013 11:08:08 +0000
List-post:<towertalk at contesting.com">mailto:towertalk at contesting.com>

I need to come up with some dimensions for 2-element yagis for 20-10M.
 I wish to maximize ability to hear weak signals.  Does that mean
optimizing f/b ratio, rather than gain?  This will be assembled from
SteppIR components that I have on hand, so dimensions can be optimized
for each frequency once a boom length is chosen.

Thanks & 73,
Barry N1EU