[TowerTalk] Pulling Heliax through conduit

[K7LXC@aol.com]

In a message dated 03/12/2000 9:03:16 AM Pacific Standard Time, 
n4zr@contesting.com writes:

> I think the real issue is being missed here - the PVC is only 2 inches ID
>  and has 4 90-degree bends in 50 feet.  The maximum radius of the required
>  bends in the 1/2" Heliax is therefore on the order of 4 inches, and pulling
>  it through the pipe by whatever method will subject it to a lot of
>  small-radius flexing.  The real question is whether it can survive this
>  sort of treatment.

      You're right. The original poster said they were "sweeping" right 
angles so I'll believe that. 

      Since the pipe-to-cable ratio is 4:1, that's good enough for me. If he 
was trying to pull multiple runs in the 2" conduit, I would NOT recommend 
that. 

     Unless the Heliax gets kinked, then it'll take a fair amount of abuse. 
As long as the cable is greased up real well with cable pulling grease, it 
should go through with no problem. Use of a Kellum pulling grip or a couple 
of clove hitches is highly recommended. 

Cheers,   Steve    K7LXC
Tower Tech  

--
FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm