[CQ-Contest] Coax Stubs for SO2R

[john at kk9a.com]

On 80m my Dunestar 600 filters have high SWR higher in the band. I never
go above 3.85 MHz so it is not an issue for me.  My 20m and 40m beams are
close together and in one case they share the same boom and I do not have
this QRM problem.  If you are using a SixPak, why not try stubs on the
output where it feeds the antennas?

John KK9A

To:	cq-contest at contesting.com
Subject:	[CQ-Contest] Coax Stubs for SO2R
From:	Jeff Clarke <ku8e at bellsouth.net>
Date:	Tue, 08 Sep 2015 23:23:45 -0400


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