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Re: [TowerTalk] Antennas for SO2R station

To: "" <john@kk9a.com>, "DAN CISSON via TowerTalk" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Antennas for SO2R station
From: "Salvatore [\"Ted\"] K2QMF" <k2qmf@juno.com>
Reply-to: k2qmf2@gmail.com
Date: Mon, 01 Mar 2021 16:56:23 -0500
List-post: <mailto:towertalk@contesting.com>
Hi John,
Can you tell us a little more about your SO2R setup??
How much power are you running?  What BandPass filters are you using, if any??
Are you using stubs??
Many Thanks for any info!!
73,
Ted  K2QMF

On 3/1/2021 3:32:00 PM, john@kk9a.com <john@kk9a.com> wrote:
I have never seen anyone put two SteppIRs on the same mast but the 7 ft
separation is more than adequate for operating on two bands simultaneously.
One of my homebrew 20m beams also has a commercial 40m beam mounted on the
same boom and there is no interference except on the harmonic.

John KK9A

WW3S wrote:

I live on a small lot, 80x180, in a subdivision....I have a 50ft tower
with a 3L Steppir on it.....I had planned on putting another Steppir 2L
about 7 ft above the tribander.....BUT......my current SO2R setup I'm
using a Hytower as the second antenna.....the rigs are a 7610 and
7300.....I have 5B4AGN bandpass filters on both rigs.....I'm already
having interference issues between the rigs now, so I think moving a
second antenna to the same mast is asking for more trouble. Just
wondering if anyone uses 2 antennas on the same mast for SO2R? Also, is
the 7300 maybe a problem? I heard that radio generates a lot of phase
noise on TX, not so good in SO2R applications. Anyway, planning for some
tower maintenance this summer, and looking for suggestions on optimizing
the station for SO2R....

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