Thanks to Tom for pointing me to this great document by K9YC. I shall review
it.
No room in the shack for stubs, as it’s literally ½ of a vy small bedroom. I may try to find room in the garage
(20’ away from the radios) as the feedlines run through there, but I may also be relegated to locating them at the
antenna switch ~165’ or so away from the shack. We’ll see. Won’t happen anytime soon. Still 2’
of snow on the ground and yesterday on the drive to work it was -30*C (that about -22*F)
Even for this Canadian, that’s cold !
So far though I’ve skimmed the K9YC document, and will peruse it at length later,
I’d still like to hear via the reflector or directly, anyone who has installed their
stubs some distance from the shack. (good or bad)
Tnx & CU (all of a sudden)
Mike VE9AA
Mike, Coreen & Corey
Keswick Ridge, NB
From: Mike Smith VE9AA [mailto:ve9aa@nbnet.nb.ca]
Sent: February 22, 2020 8:18 PM
To: 'Tom Hellem'
Subject: RE: [CQ-Contest] SO2R Coax Stub location; outside?
Hi Tom,
Thanks for the tip. I didn’t know about this document, so just googled it and
downloaded it…reading now (a lot to digest)
73 - Mike VE9AA
Mike, Coreen & Corey
Keswick Ridge, NB
From: Tom Hellem [mailto:tom.hellem@gmail.com]
Sent: February 22, 2020 7:57 PM
To: Mike Smith VE9AA
Subject: Re: [CQ-Contest] SO2R Coax Stub location; outside?
Mike-
You might check Jim Brown's (K9YC) website. I'm pretty sure he did an article
on stubs not long ago and if I remember right, there are certain locations along
a transmission line where stubs are much more effective than placing them in a
random location.
73
Tom
K0SN
On Sat, Feb 22, 2020 at 4:47 PM Mike Smith VE9AA <ve9aa@nbnet.nb.ca> wrote:
Is it reasonable to assume I could locate all my coax stubs 165' away from
the shack outside at the antenna switch?
Currently I run SO2R with no band pass filters, nor coax stubs, but I have a
'relatively' large lot (2.2ac) and "radio 2" has a single antenna
(horizontal ZS6BKW) located at the opposite end of the lot and the primary
"radio 1" has a variety of verticals or vertical arrays, so it works.
Sometimes that's an advantage (speed of QSY's; not ever having to worry
about switching in stubs or filters) but sometimes there is a very small
amount of crossband QRM (self inflicted) and it always prevents running on 2
bands with my 'best' antennas. For example, when I am running on 40m/80m I
have to choose one 4-Sq and always the horizontal antenna is parked on
"radio 2" (a ZS6BKW w/ 15m add-on element).
If I bought 2 sets of bandpass filters and made up 6 coax stubs that I could
locate out at the antenna switch, I think it would be a small step up for my
signal on some band combos. The relatively low ZS6' ain't exactly a pileup
buster ;-)
Reason is, there is NO ROOM in the shack for stubs. Just none.
So, any downside to doing it this way?
Mike VE9AA "NB"
Mike, Coreen & Corey
Keswick Ridge, NB
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