[CQ-Contest] Coax stubs with 6-PAK, WAS: Coax Stubs for SO2R

[Bill Hider]

My SO2R station:
I have individual/separate coax home runs from each antenna back to the
antenna panel in my shack.
My 6-Pak is in the shack.
I have six, individual W2VJN-designed-and-built stub filter networks between
the six band outputs on the 6-Pak to each antenna port, as follows.
On 160 & 80 I have one antenna per band.  So, the output of the stub filter
network for those two bands goes directly to the coax connector on the coax
run to each antenna.
On the other four bands, I have two separate antennas for:  40, 20, 15 & 10.

On these four bands, the output of the stub filter network for each band
goes to the common port of an individual  Stack Match box dedicated to the
two antennas for each of those bands.

I have two ACOM 2000A amps, each connected to its corresponding input port
(A or B) on the 6-Pak.

This setup works exceedingly well.  I am able to operate both radios on any
two bands without interference.
I described other details of my W2VJN stub network in an earlier post to
this subject yesterday.

I will be glad to answer any questions about this.  Just ask or email me
directly.
n3rr at erols.com

I have some pictures & write ups on my website.  Scroll down to the System
Design links on my home page.
http://users.erols.com/n3rr/

I do intend to write up my stub filter network design details with the graph
plots of the attn., IL, VSWR of each network,
as time permits -- I'm doing lots of writing on several subjects right  now.

73,

Bill N3RR

-----Original Message-----
From: CQ-Contest [mailto:cq-contest-bounces at contesting.com] On Behalf Of
Jeff Clarke
Sent: Tuesday, September 08, 2015 11:24 PM
To: cq-contest at contesting.com
Subject: [CQ-Contest] Coax Stubs for SO2R

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
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