In his well-stated list of grounding advice, Gene AD3F includes: "3. You
ought to ground each coax cable shield to the tower at the top and at the
bottom of the tower."
I've seen this advice before, but have never understood the reason for it,
or what the adverse consequences might be if everything else Gene recommends
is done, and this is not (as is the case with my system). Can anyone
explain this for me, please?
73, Jerry K3BZ
----- Original Message -----
From: <ersmar@comcast.net>
To: "Richard W. Solomon" <w1ksz@earthlink.net>; <towertalk@contesting.com>
Sent: Wednesday, January 03, 2007 11:52 PM
Subject: Re: [TowerTalk] Antenna/Tower Grounding (Lightning Protection)
> Dick:
>
> Below are some nuggets of wisdom I've gathered from reading the
> postings on this reflector over the years.
>
> 1. You cannot protect the tower, antennas and rigs from a direct
> lightning strike. You can only attempt to minimize the damage if that
> happens.
>
> 2. Your tower ought to have at least one ground wire, minimum of #8
> gauge wire, to one ground rod within two feet of each tower leg. The
> latest version of the National Electrical Code mandates two ground rods
> and two wires at each leg.
>
> 3. You ought to ground each coax cable shield to the tower at the top
> and at the bottom of the tower.
>
> 4. You ought to install lightning suppressors on all wires and cables
> coming into your shack. Polyphaser makes these as do ICE and Delta. <All
> cables> includes the coax runs, your control lines to your rotator and
> antenna switch(es), and any DC or AC supply lines going up the tower.
>
> 5. You ought to install these suppressors immediately outside your
> shack entrance onto a single-point ground (SPG) panel. This panel ought
> to be connected to another ground rod via another #8 minimum ground wire.
> The ground connections from all the electrical systems within your house
> (electrical supply panel, cable TV, telephone, etc.) should also be
> connected to this SPG panel.
>
> 6. You ought to search the TowerTalk archives for details on how to do
> all of these things.
>
> 7. When you have finished reading all you can stand, come back to this
> reflector again and ask some more questions. We're only too glad to help.
>
> What did I miss mentioning, gents?
>
> 73 de
> Gene Smar AD3F
>
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