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Re: [TowerTalk] 6 x 2 unit...

To: towertalk@contesting.com
Subject: Re: [TowerTalk] 6 x 2 unit...
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Wed, 20 Apr 2016 18:54:52 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Plan on allowing for expansion.

The nice thing about a decoder and a controller is it will pick the proper antenna for you. The odds of the wrong antenna using manual switches, even properly labeled are quite high. IOW, it becomes a question of when, not if you transmit into the wrong antenna. Yes, I know there are those who say they have used that scheme for years without a problem, but according to the odds they are the lucky exception rather than the rule.

Another point about the remote selecting switches is they easily allow for adding antennas to the system. They do not have to be monobanders. 20, 15, and 10 can all select the same antenna with most systems. My six pack has remote switches connected to two of the outputs. That means few of those connections identified with a band actually are used for that band.

NOTE: If you end up with any unused connectors (IE SO239s) lightly lubricate the threads and use a plastic cap to cover the connector. If not properly weather proofed the silver plated connectors will rapidly deteriorate. I've had them become unusable in just a few months.

73

On 4/18/2016 Monday 6:47 AM, Earl Morse wrote:
For simple as possible, skip the remote switches.  Run all the coaxes into the 
shack.  Have a 4 to 6 way coax switch on each radio.  Use 2 way switches to 
switch the more popular antennas between either radio.  It is manual operation 
but you probably have everything laying around the shack to put it together now.

While having the ability to switch any antenna between either radio and having 2 
antennas for each band is nice you will find that for SO2R you tend to have a 
primary radio and a secondary radio.  Primary is going to be running on the most 
productive bands with the best antennas while the secondary radio is going to be 
S&Ping on the off bands with whatever antennas you have left over, most likely 
the next band up or down from the run radio.  The important bands of interest are 
going to change depending on the contest.  In most cases, propagation will make 
bands mutually exclusive of each other.  For example, you won't need 160/80M during 
the day when 20-15-10M is hopping, and vice-versa.  So being able to switch any 
antenna to any radio at any time probably isn't needed.

Run it manually for a while and you will figure out exactly what you need.

Earl
N8SS


------------------------------

Message: 6
Date: Sun, 17 Apr 2016 19:13:51 -0400
From: "Douglas Ruz / CO8DM"<co8dm@frcuba.co.cu>
To: "Towertalk"<towertalk@contesting.com>
Subject: [TowerTalk] 6 x 2 unit...
Message-ID:<00d701d198fe$d1ef96b0$75cec410$@co.cu>
Content-Type: text/plain;       charset="us-ascii"

Hi,

I am building a simple as possible SO2R configuration.

I need some advices about a 6 x 2 antenna relay unit.I prefer a kit because
it is cheaper.

I think I need build also a Band decoder.any idea?

Thanks,

Doug, CO8DM



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73

Roger (K8RI)


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