[TowerTalk] M2 OR2800 Terminal Box Question

[john at kk9a.com]

How do you get your wires into the sealed box?  I usually drill holes in the 
bottom for the wires and make no attempt to seal them and this lets out any 
moisture.  The only downside is wasps can get in if the holes are too large.

John KK9A



To: <towertalk at contesting.com>
Subject: [TowerTalk] M2 OR2800 Terminal Box Question
From: "Mark Robinson" <markrob at mindspring.com>
Date: Wed, 15 Sep 2010 16:28:29 -0400
List-post: <towertalk at contesting.com">mailto:towertalk at contesting.com>

I am putting together the diecast terminal box for my M2 OR2800 rotator.
This is a sealed diecast box that mounts on the tower just under the
rotator. It connects to the rotator by a short cable and the rotator cable
to the shack also enters this box.   I have a couple of questions.


1)    This is a sealed box but I am thinking that it might be a good idea to
drill a small weep hole at the bottom of the box. 1/8 hole maybe. Is this is
a good idea.


2)   This rotator uses a pulse positioning sensor and this pulse signal is
fed via a shielded cable as part of the rotator cable assembly. I have
grounded this shield at the bottom of the tower and at the SPG. I think that
I should ground the shield at the top of the tower inside this box as well.
I have added a small grounding pigtail attached to a screw inside the
diecast box. Is grounding the shield here a good idea?



73 Mark N1UK