Will and others who suggested putting the stub at the antenna side
connectors of your Six Packs.... Are your switch boxes at the top or bottom
of your tower or inside the shack? The stubs are actually on your towers?
My box isn't on a tower. It's mounted on post in the woods where my antennas
are, maybe 75 to 100 feet away from my shack. The SO239's for each band on a
Six Pack seem to be pretty close together on the box. You are able to fit a
T-connector and a stub on one of those SO239 positions despite that?
Jeff
On Sep 9, 2015 1:08 PM, "Roberts, Will" <Will.Roberts@duke-energy.com>
wrote:
Hey Jeff,
I use only tuned stubs for SO2R with my Six Pak. I don’t have any other
filtering. I connect the stubs on the antenna side coax connectors on the
Six Pak with one or more T connectors. There is 75’ of coax between the Six
Pak switch box and the stations. It seems to work reasonably well. There is
a little interstation interference, but most of that is just on harmonic
frequencies, so it is manageable. Make sure your stubs are cut well as N3RR
mentioned. Mine were cut by W2JVN. Also, make sure that the T connectors are
high quality. I had initially used some cheap Chinese T connectors that came
apart under the strain of the stubs pulling on them. In one case, a T
connector developed an intermittent that allowed increased interference. All
replaced by Amphenols now.
73,
Will AA4NC
From: Jeff Clarke <[1]ku8e@bellsouth.net>
To: [2]cq-contest@contesting.com
Subject: [CQ-Contest] Coax Stubs for SO2R
Message-ID: <[3]56109.69958.bm@smtp220.mail.gq1.yahoo.com>
Content-Type: text/plain; charset=utf-8
Wondering how those of you using a Six Pack antenna switch hookup your
stubs? I have two coax cables from the Six Pack coming into the shack going
to each radio. Each station has a multi band Dunestar switchable filter. For
the most part the Dunestar works well but since I recently added an KPA500
to my run station, when I'm on 40 meters with the amp it gets into 20 meters
on station #2 pretty bad. Are you all using a T connector and have the stubs
for each band on a manual multi position antenna switch?
Also does anyone know if the Dunestar's are tuned for a specific part of the
band. On 80 meters mine seems to have a very high SWR when I switch it in
even though the SWR on the KPA500 looks good.
Jeff
References
1. mailto:ku8e@bellsouth.net
2. mailto:cq-contest@contesting.com
3. 56109.69958.bm@smtp220.mail.gq1.yahoo.com">mailto:56109.69958.bm@smtp220.mail.gq1.yahoo.com
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