[TowerTalk] TowerTalk Digest, Vol 219, Issue 2

[w5wz at w5wz.com]

> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 01 Mar 2021 18:20:29 +0000
> From: WW3S <ww3s at zoominternet.net>
> To: "towertalk at contesting.com" <TowerTalk at 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