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@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Clint Talmadge W5CPT
Sent: Saturday, April 30, 2011 3:52 PM
To: towertalk@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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