[Towertalk] which box to use ?

[Bill Hider (N3RR)]

It's a no-brainer:

Metal - and steel at that.  Aluminum will not do the following:

With steel, you get the benefit of Faraday shield that you will not get with
plastic or with aluminum.

All cables (coax, rotor, other control cables, even CATV, TELCO, etc.)
should go through a hole in the SPG metal box, and thereby through the
Faraday shield.  This will protect from H and E plane energy that builds-up
on the cables en-route to the SPG box.  The box itself should be grounded to
a ground rod via a very low-inductance ground, such as a copper strap
located directly below the SPG.  In the case of a SPG box that's rather
large, or if you want more protection, ground the box at the leading edge
and trailing edge lower corners.  The leading edge is a reference to the
route that the incoming ground wire (from the tower or ground-grid) takes to
the SPG and the direction the outgoing ground wire (to the rest of the
ground-grid) takes to/from the SPG.  See my website for my example:
www.erols.com/n3rr

73,
Bill Hider, N3RR

----- Original Message -----
From: <KB2HUK@aol.com>
To: <towertalk@contesting.com>
Sent: Monday, September 02, 2002 12:01 PM
Subject: [Towertalk] which box to use ?


> <PRE>Hello everyone !  I need some advise.  I am terminating all my runs
of coax
> and rotor cable into a box which has the correct poly phayser suppressors
> installed in a length of 1/4 inch thick buss bar. the coax will then come
out
> of the surpresors and into the house.  my question is this I am planning
to
> enclose this junction in a box I want to know which would be better to use
a
> metal electrical box or a plastic non conductive box like the new tool
boxes
> ?  I have both . thanks for your input !     John kb2huk
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