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Re: [TowerTalk] running cables up the tower

Subject: Re: [TowerTalk] running cables up the tower
From: Pete Smith <>
Date: Fri, 01 Sep 2006 10:12:34 -0400
List-post: <>
If a tower is shunt-fed, particularly with high power, is this an exception to 
your general rule, Steve?

73, Pete N4ZRAt 09:31 AM 9/1/2006, wrote:
>In a message dated 8/27/2006 12:28:30 P.M. Pacific Daylight Time,  
> writes:
>>  On a Rohn 25/45/55 tower, is it standard practice to run  hardline, coax 
>control cables up the tower legs inside the tower or  outside? 
>    Standard practice is to put them outside and  secure them to a leg. The 
>only reason I can see for running the cables inside  the tower is the possible 
>use of the tower as a Farraday shield for lightning  protection. 
>    Even doing that does nothing to prevent the  lightning transient from 
>traveling down the cables into the shack so it would  be a waste of time (and 
>much energy and colorful colloquialisms) to run them  inside the tower without 
>adequate building entry grounding. 
>>  Are cable ties the best way to attach the  cables?
>    Could be. Some guys like to use 6" pieces of wire  to tie the bundle 
>together; they're easy to take apart when you want to add or  subtract a 
>>  Seems like it would be a lot easier to  string cables on the outside of the
>    Bingo! I will only run cables inside a tower if  the owner holds a gun to 
>my head - it's just too much hassle for little or no  practical usefulness. 
>>  More specifically, in addition to a fairly large complement of  coax (5 
>and control cables (7 runs), I'm thinking about putting a  couple of runs of
>1-5/8" hardline (because that's what I have) up to my  stack switch at about
>65'. Seems to me it will be difficult to feed this  stuff into the tower and
>it may be better to run it on the outside. Has  anyone out there run 1-5/8"
>hardline up a ham tower? How did you do it and  how did you attach it to the
>First, you should use a hoisting grip or  Kellum grip to pull the cable up - 
>it weighs a couple of pounds per foot. It  spreads the weight over a large 
>area of the cable safely so you don't damage  it. Then attach the hoisting 
>to a brace and it'll support the whole  weight. Using a hose clamp or two is 
>another way to secure it. Then black tie  wraps will finish it off. Do not use 
>white tie wraps - they're not UV  resistant and will fall apart in a year or 
>Steve     K7LXC


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