Sorry......the hyperlink in the second example should be: and point #8 at
http://www.gpr-expert.com/lightning-protect.htm not the messed up webferret
listing below......
bill
----- Original Message -----
From: "Bill Otten" <res0958z@verizon.net>
To: <n8de@thepoint.net>
Cc: <ag0n@arrl.net>; <towertalk@contesting.com>
Sent: Wednesday, January 02, 2002 9:30 pm
Subject: Re: [TowerTalk] copper pipe for SPG connect??
>
> That kind of defeats the whole concept of making certain there is no
> potential difference between the ground at the tower and station and the
> home electric ground doesn't it? And (unless I'm wrong...) IF the
potentials
> ARE different, doesn't that cause the damage to homes, and equipment, and
> appliances? I note the grounding pictorial at the station of N3RR,
> http://users.erols.com/n3rr/photos/grounding_pictorial.jpg and point # 8
at
>
http://webferret.search.com/click?wf,antenna+grounding,,www.gpr-expert.com%2
> Fcell-site2.htm,,hotbot relating to single point grounding: "Single point
> grounding is an absolute must, because the resulting GPR from lightning is
a
> wave of voltage rise, or energy surge that passes through a grounding
> system. This demands that all equipment be bonded to the grounding system,
> at one location (single point), to insure that every metallic object rises
> and falls in potential together."
> See also the following: http://www.tarry.net/sunwest/gnd.html and
> http://www.tarry.net/sunwest/tower.jpg
>
> By the way, when my home took a strike this past summer we had damage to
the
> cable tv boxes, two televisions plugged into the cable boxes for power
were
> shot, the remaining tv standing alone plugged into a wall outlet had no
> damage, one computer connected to the phone lines and an 8" wide by 4 " by
2
> " deep hole blown in the concrete floor of the rear bedroom of the home
> where my station is located. It shattered the ceramic tile on the floor
over
> 4 squares of tile along the rear baseboard. The electric panel in the
garage
> blew out 3 breakers on one side of the panel, the outside telephone
company
> connection box was blown off the side of the house, and the underground
> connection at the street was destroyed, with the fiberglass cover found
> blown some 90 feet away into a neighbors house. My tower mounted remote
> antenna switch suffered no damage, no damage to the rig because the cables
> were disconnected. I should have sued THEM for the damage because
apparently
> the strike came in on THEIR equipment. My next door neighbor also lost 2
> computers and a television. NO thunderclap was heard, no flash seen,
> although I did hear what sounded like a small caliber pistol shot when the
> tile exploded.
>
> I'd be interested in more discussion on the use of a single point ground
> system as described above.......
>
> 73
> Bill (KC9CS)
> res0958z@verizon.net
>
> ----- Original Message -----
> From: "Don Havlicek" <n8de@thepoint.net>
> To: "Bill Otten" <res0958z@verizon.net>
> Cc: <ag0n@arrl.net>; <towertalk@contesting.com>
> Sent: Wednesday, January 02, 2002 7:10 pm
> Subject: Re: [TowerTalk] copper pipe for SPG connect??
>
>
> >
> > If your SPG system were to be struck by lightning [via your
> > antenna/tower], I would be willing to bet that the power company and
> > telephone company would both sue you for causing damage to their systems
> > on your property! They would in my part of the world!
> > I was warned, when I had the service buried, NOT to tie into ANY part of
> > their systems, even the common ground!
> > Don
> > N8DE
>
>
>
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________________________________________________________________________
This list is sponsored by the new eHam.net Store. When you buy products
like ICE filters, Array Solutions StackMatch, or M-Squared Antennas from
the eHam Store for the same price you pay direct, a portion of the sale
price goes to support this list. Check it out at http://www.eham.net.
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
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