[TowerTalk] Water in the conduit - a different idea

[Al Kozakiewicz]

Waste of time.  There are millions of miles of buried conduit in the world with no special care taken with respect to condensation. Unless you're planning to run uninsulated wire, I'm not sure what the benefit would be.  The very same control wire and coax will be exposed to the weather which is a significantly harsher environment than conduit.

Al
AB2ZY

-----Original Message-----
From: towertalk-bounces at contesting.com [mailto:towertalk-bounces at contesting.com] On Behalf Of Clint Talmadge W5CPT
Sent: Saturday, April 30, 2011 3:52 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Water in the conduit - a different idea

I am about to add a couple of antennas and the idea of burying conduit for the coax and control cables came up again.  The stories of water collecting made me think of how to avoid this.  What if I were to add a small fan to the box to which I am going to hang on the outside wall of the shack to which I am going to connect the conduit?  This fan would pressurize the ambient air which should eliminate any standing water in the system.  A small shroud to keep out the direct rain should be sufficient.  Small screened weep holes in the boxes at the tower base and the box for the phasing network for the verticals would allow any moisture in the pressurized air to escape.  The fan, being outside should not cause any objectionable noise.  I am thinking of something along the lines of a larger muffin fan which will run off house power fed out through the conduit installed through the wall. 

 

I have tried to come up with any negatives, but have not (yet).  Any ideas, positive or negative on this plan?

 

Clint - W5CPT - West Kentucky

 

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