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[Towertalk] Coax Condiut

To: <>
Subject: [Towertalk] Coax Condiut
From: (WA2BPE)
Date: Fri, 05 Jul 2002 14:02:50 -0400
Good idea but you had better check your soil percolation first.  In my 
(specific) location, the topsoil is 0 to 6" with a high clay content followed 
by shale/rock and/or clay.  Drainage is almost nil.  Here, a "French drain" 
would fill up and go nowheres without additional gravel, etc.  This problem is 
commonplace with septic systems and why sand filters are required.

Tom - WA2BPE

Tom Hybiske wrote:

> David, I agree with WC1M suggestions.  Additionally, I would suggest the 
> installation of a "T" in the middle of the run that would drain into an 
> underground "French drain"; a bucket-sized hole filled with gravel.   An 
> amazing amount of condensate will accumulate over a period of time, and 
> literally bathe your coax and control cables in water.  A gentle slope on 
> either side of the "T" will allow the condensate to run into the hole to 
> absorbed into the ground.  I would bring the pipe up alongside of rather than 
> thru the base.  While the latter looks nice, it might be a PITA later on 
> should you ever have to modify your conduit run.  When I ran mine, I 
> purchased all the materials from Home Depot with also carried the sweeps 
> you'll need for the 90's.  I have four 90's in my run, and had no problems 
> chasing a "ghost" thru the pipe using the exhaust from a shop vac and a 
> string tied to a plastic bag.  This was followed up with the actual pull 
> rope.  My 3" conduit contains one  7/8" Heliax,
> one RG8, rotor control, coax switch control, one weather station control, and 
> a length of pull rope.  With the exception of the weather station, all were 
> pulled at once with the help of Ideal wire lube and my really big kid!  I 
> fed, he pulled.  Remember that unless you can chase a future ghost thru the 
> conduit, the pull rope you have in there will wrap around the existing cables 
> as they were fed thru the run.  Future runs can be difficult to pull, so try 
> to do as many as you can at once.   A larger than required pipe will also 
> facilitate a fresh pull line easier than one that's just big enough.  Good 
> luck with your installation.
> 7 3,
> Tom K3GM
> Sturbridge, MA
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