I have a number of Hoffman Enclosures outside and I make no attempt to seal
cables going in. My cables come in though large holes in the bottom of the
box and everything inside stays dry. The only issue with doing this is that
insects can get inside. I would not recommend installing antenna switches at
the top of the tower.
John KK9A
To:towertalk@contesting.com
Subject:[TowerTalk] utility box and feed-throughs
From:Hans Hammarquist
Date:Fri, 19 Apr 2013 16:48:20 -0400 (EDT)
I am planning to put a box near the top of my tower and use it for various
signal wire connections such as rotator cables, antenna switches etc. My
idea
was to pull a multi-conductor cable between my shack and this box, have
several
screw terminals in the box to attach whatever I need signal and power for.
(Yes, I have a 115 V output in the tower already. It has survived several
winters so far. No, I don't have power on it unless I need to.)
In order to make the box reasonable water tight I plane to use regular,
sealed
feedtrough for the cable. My dilemma is: What feed-through do I use for the
cables between the rotators and the switches etc and the box? I can add a
sealed feed-through each time I need a new connection but that requires me
to
make a hole in the box and put a sealed feed-through each time. Not a big
deal
if yuo are on the ground or in your work shop but hanging by one arm, 80
feed
up does not appeal to me.
Is there anything out there made for this purpose? It needs to be very easy
to
use, be able to accept several cables, if so small and it needs to be able
to
seal out at least insects but water is also not very welcome.
73 de,
Hans - N2JFS
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