Bill,
Please explain your statement that Aluminum will not produce a Faraday shield.
Art
KB7WW
"Bill Hider (N3RR)" 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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>
> _______________________________________________
> Self Supporting Towers, Wireless Weather Stations, see web site:
> http://www.mscomputer.com
> Call 888-333-9041 to place your order, mention you saw this ad and take an
> additional 5 percent off
> any weather station price.
> _______________________________________________
> Towertalk mailing list
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