KZ4USA wrote:
> Anyone ever take two or maybe three of these and make a 9El
> vertical array.
>
> If you had the room would it outperform a 3El yagi for 80 meters in
> one direction?
>
> Just wonder.
>
> KZ4USA
>
>
>
>
You will need a space of about 1200 feet to build it and a method of
accurately aiming it, 11.3 dBi gain, beamwidth 12.2 degrees.
Jerry, K4SAV
To which N2EA appended:
Assuming you could efficiently match it and deliver power to it.
Figure 3dB loss in that scheme, and you'd net out with 7 or 8 dB fwd
gain,
and a beamwidth which won't span europe. Plus, with 9 el, you'd have 8
rear/side nulls/lobes which were maybe 10dB down from the fwd lobe.
Yagi pattern would be cleaner.
If you were to add the price of copper into a spreadsheet model, and
plot
$Cu/dB, you'd likely find things would optimize around 3 or 4
vertical elements,
in some configuration.
Unless you had a specific reason for a rifle-shot, you'd be better
off with
something simpler to match and control. Like putting the money in
steel instead
of copper, and trying a pair of switchable, crossed inverted vees at
100'?
Good question. Good modelling. KISS?
73/n2ea
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