[TowerTalk] vertical antenna advice needed

[Grant Saviers]

Rarely discussed antennas are the Bobtail and Sterba curtains. Google 
them. These produce a bidirectional narrow beamwidth pattern with low 
angle gain, and are fun to build (measure, don't guess at the Sterba 
phasing line Vf).  With some simulation work it might be possible to 
build a reflector that works to give them some F-B.

No radials for either.  a link re bobtails 
http://www.mdres.org/w7htj/antennas.htm

Check out W8JI's extensive work on curtains 
http://www.w8ji.com/curtain%20sterba%20USIA%20array.htm

Grant KZ1W


On 6/14/2013 5:06 AM, PY1NB - Felipe Ceglia wrote:
> Hello folks,
>
> I'd like to hear your opinions about this topic.
>
> I am looking for an antenna (or more than one) for 10/15/20m that has the
> following characteristics:
>
> - vertical polarization
> - smallest possible horizontal far field lobe
> - "good" forward gain (at least comparing to a single element vertical)
> - greatest possible front to back ratio
>
> I was thinking about using:
>
> - a tribander tilted 90 degrees
>
> - 2 element end phased array of:
>     - vertical dipoles
>     - sitting on the ground verticals (with or without radials?)
>     - multiband verticals (using W9AD phasing line to switch between bands)
>     - 5/8th wave verticals (at least for 10m, it would be easy to convert CB
> antennas)
>
> - a 4 square
>
>
> These antennas would be used for RX only.
>
> Any suggestions, anecdotal comments, field experiments?
>
> 73 and thank for your time,
>
> Felipe Ceglia - PY1NB
> -------------------------------------------------------------------------------------
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> http://dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.com
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