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Re: [TowerTalk] rotor control cable and the bulkhead....?

Subject: Re: [TowerTalk] rotor control cable and the bulkhead....?
From: Gene Smar <>
Date: Mon, 07 Jul 2008 15:38:00 -0500 (CDT)
List-post: <">>

     Polyphaser make a surge arrestor just for DC cables such as rotator 
control lines.  You bolt this arrestor onto a grounded metallic plate such as 
your bulkhead (?) and connect all 7 or 8 control cable wires to the respective 
screw terminals on the arrestor.  

     This is a shunt protector so the control cable continues on into the shack 
via a similar cable that connects in parallel with the lines from the tower 
(red-red, blue-blue, etc.)  In other words, if you could simply open the 
control cable's jacket and strip a half-inch of insulation off each control 
line, you would then connect that bare wire to one of the eight terminals on 
the Polyphaser.  

     But remember:  These Polyphaser devices, like the rest of their line, are 
NOT weather-resistant.  You ought to mount any and all Polyphaser devices in 
some sort of weather-resistant box.  

73 de
Gene Smar  AD3F

Date: 2008/07/07 Mon PM 03:52:30 EDT
Subject: [TowerTalk] rotor control cable and the bulkhead....?

A Question...

how does one take the 7 or 8 wire cable thru a bulkhead and into the 
station?  I cannot see how a lightning strike hitting the mast or the 
yagi or beam or ??? on that mast is not going to travel down to ground 
using the tower, the coax, and the control cable.  I use an antenna 
switch box mounted on my Rohn with a piece of coax going thru the 
bulkhead thru the usual grounding connectors.  but cannot figure out 
how to ground the rotor control cable before it enters the shack.

73 de chas/k5dam

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