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Message: 1
Date: Mon, 01 Mar 2021 18:20:29 +0000
From: WW3S <ww3s@zoominternet.net>
To: "towertalk@contesting.com" <TowerTalk@contesting.com>
Subject: [TowerTalk] Antennas for SO2R station
Jamie,
In response to your question on TowerTalk:
At W5WZ, we run legal limit SO2R, M/S, and M/2 on three stacked
multi-band Force 12 yagis (stack distance 37ft) that have 10, 15, 20,
and 40 on the same booms. On each boom, each band is fed by a separate
feedline (LMR400) to the StackMatch at the base of the tower. From
there, 1/2" hardline runs 200' back to the antenna switch shed via a
buried conduit. In the antenna switch shed, a SixPack is followed by
Coax Stub Filters on every band. The main transceivers are Elecraft K3.
A diagram of this setup at W5WZ can be found at:
https://www.w5wz.com/wp-content/uploads/2017/11/W5WZ-Station-Diagram-as-of-11282017.jpg
Multi-Transmitter Filters by K2TR (from K1TTT archives, this was also a
resource 10 years ago when designing the station)
https://www.w5wz.com/wp-content/uploads/2010/10/img_1212987398_15036_1285719013_mod_384_488.jpg
At each XCVR, we now ALWAYS use the RCV ANT OUT looped through DXE HD
Receiver Guards and back into the radios via RCV ANT IN.
We also have two interlocked in-band S&P stations (FT-1000MP) on
separate towers & antennas, with several hundred feet of physical
separation between the antennas on the main tower.
I highly recommend the book "Managing Interstation Interference" Revised
Second Edition by G. Cutsogeorge, W2VJN, as a resource to plan and
design your station.
--Scott, W5WZ
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