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

[Richard (Rick) Karlquist]

The only way to get high F/B ratio on a 2 element
beam is to make it a driven array, rather than
a parasitic (Yagi) array.  For example the ZL special.
You can still use SteppIR components, but you need
two driven elements.  I made a 2 element driven array
for 80 meters using two 40 meter MonstIR elements.
No problem to get high F/B on receive (this was a
receive only antenna).  F/S was also very high.

Your other option of course is to upgrade the 2
element SteppIR to 3 elements.

Rick N6RK

On 1/13/2013 3:08 AM, Barry N1EU wrote:
> 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
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