I cannot answer whether stubs are adequate. It is possible especially
since you have that much spacing If you had monobanders you would have
more out of band rejection than using tribanders. If it were me, I would
play it safe and invest in bandpass filters instead of all of the coax,
connectors and switching. I have had good success using Dunstar bandpass
filters.
John KK9A
To: rtty@contesting.com
Subject: [RTTY] Simple filtering for SO2R ?
From: Gordon Bousman <nw7d.ham@gmail.com>
Date: Wed, 30 Oct 2013 16:44:27 -0700
I'm just getting started in setting up my station for SO2R and am taking
baby steps to get things set up due to a somewhat limited budget. However
I now have a 6-Pack antenna switcher in the shack and a MicroHam M2KR+ will
arrive in a few days to control my Icom 7600 and 756 Pro III rigs using
Writelog. As far as filtering goes (and in order to be ready for the WAE
RTTY contest), can I get by for now with filtering by just making up some
stubs (which I think I will mount at the 6-Pack)? I only have one
low-power amp (300 watts) and the 2nd rig will run barefoot. The main
antennas are two hex beams separated about 100' from each other - plus a
wire OCF antenna for 40-80 which is more or less between the two hex beams.
I've tried to read about stub filtering online but I'm still unsure
whether stub filters alone are sufficient. I would hate to blow up the
front end of my brand new 7600.
Thanks for any advice - this is sort of a last-minute rush SO2R project to
be ready for WAE.
73 Gordon NW7D
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|