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Re: [TowerTalk] vertical antenna advice needed

To: <TOWERTALK@contesting.com>
Subject: Re: [TowerTalk] vertical antenna advice needed
From: <john@kk9a.com>
Date: Sat, 15 Jun 2013 00:15:15 -0000
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I assume that you are looking for a multiplier antenna.  I believe that 
K3LR, W3LPL, etc use a four square for each band.  Hopefully they can 
respond with the details;  I wonder how far away it needs to be from the 
main TX antenna and if any filtering or receiver protection is needed.

GL,
John KK9A



To:"Tower and HF antenna construction topics." <towertalk@contesting.com>
Subject:[TowerTalk] vertical antenna advice needed
From:PY1NB - Felipe Ceglia <felipeceglia2@gmail.com>
Date:Fri, 14 Jun 2013 09:06:43 -0300
List-post:<towertalk@contesting.com">mailto:towertalk@contesting.com>

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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