Unless they changed the laws of Physics while I was asleep last night
Aluminum makes a wonderful Faraday shield.
Norm N8NH
At 03:05 PM 9/2/02 -0400, you wrote:
>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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>
>
>_______________________________________________
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>additional 5 percent off
>any weather station price.
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