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

Gene Smar ersmar at verizon.net
Mon Jul 7 13:38:00 EDT 2008


     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

From: chasm at texas.net
Date: 2008/07/07 Mon PM 03:52:30 EDT
To: towertalk at contesting.com
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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