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Re: Topband: [160m] RE: Control cable

To: <Topband@contesting.com>
Subject: Re: Topband: [160m] RE: Control cable
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Thu, 31 May 2007 21:22:32 -0400
List-post: <mailto:topband@contesting.com>
Thanks to everyone for the suggestions. Several people 
suggested a multiplexed control system. In S.Amherst Ohio I 
had a single cable running out for about a half-mile or 
more. I ran 48 volts into that cable along with audio tones. 
The audio tones were tied to a BCD encoding system that gave 
many choices of control functions. This wasn't touch tone, 
it was several switched tones that could be on in any 
combination.

That was OK because I had one hub.

At this QTH I have switching hubs distributed along a trunk 
that contains several feedlines and one control line. The 
hubs are spaced around 500 feet or more apart, and there are 
four of them. I didn't want to build five or six  remote 
boxes ( I need a spare or two) plus the encoding hardware. 
Especially with lightning worries. Simple is better.

I found some (just under 3000 ft) of suitable 18 gauge alarm 
and telco wire 12 conductor on that e place we all know 
about. It was good, new, and very cheap (10 cents a foot).

Several people suggested sprinkler wire and it is a good 
choice. All of the sprinkler or irrigation control wire I 
could find was about 40-50 cents per foot for 10 or 13 
conductor. It was available from multiple sources brand new. 
That would have been my second choice except I'm a cheap 
Ham.

73 Tom




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