The quad is a good suggestion. Actually a 4 element triband quad is a
pretty good performer, and the humble 2 element triband quad can do a
surprisingly good job. Most of the Force12 tribanders seem to have
been constructed for a single feedline, and none of the trapped
tribanders available these days are appropriate for this.
The filters need to do a real bang-up job. The optimum high power
SO2R station has separate towers for -- this allows better isolation
between antennas.
----- Original Message -----
From: "Andrew Roos" <andrew@exinet.co.za>
To: <cq-contest@contesting.com>
Sent: Monday, May 26, 2003 7:44 AM
Subject: [CQ-Contest] Antennas for SO2R
> Hi All
>
> I'm new to contesting, a few of you may have worked me in the ARRL
> international DX CW contest or in CQWW WPX CW last weekend. I used
both of
> these as "shakedowns" of my equipment, plus practise for myself!
>
> I recently moved into a new home and am planning an antenna
installation.
> The house is on about 1300 sq. m. (1/3 acre) so I'm not talking an
antenna
> farm; rather a single (hopefully 18m) tower with a well chosen
antenna or
> two on top, supplemented by wire antennas on the low bands. That's
as much
> as I think I'll be able to get away with, I've already received some
> objection to my application for a tower from a couple of neighbours.
>
> I recently read about SO2R operating (thanks to the contesting.com
poll) and
> it sounds like something I would like to do in a year or two (for
the
> moment, SO1R is quite enough of a handful). Especially since my YL
(and soon
> to be XYL) is also a ham and although she's not yet into contesting
it would
> also be nice to be able to work multi-two if we want.
>
> So what I would like to do is put up a tribander which can be fed
using
> separate coax feeds for 20, 15 and 10m. Then with the correct
switching and
> filtering I can run either SO2R or multi-2. Note that due to
neighbour
> problems, multiple towers are not an option, nor can I put too many
antennas
> on one tower (two antennas at 18m is about the limit, one would be
better).
> I know the Force 12 C-31XR allows separate feedlines. However that
antenna
> is just too big for my location, and the smaller antennas in the
Force-12
> range like the C-19XR and C3 do not appear to allow seperate feeds
for
> different bands.
>
> So do any of you good folks know of any good small tribanders with
seperate
> feeds for each band? Or alternatively, am I going about this the
wrong way
> and do you have a better suggestion? (Short of buying a large farm
:).
>
> Many thanks
> Andrew ZS1AN
>
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