[R-390] Grounds

[Cecil Acuff]

There seem to be two camps on grounding...

Ground it all as well as you can and with proven techniques and then the 
isolate the whole thing...grounds only attract lightning.

I can't sleep well at night knowing I did nothing because I've seen what 
that resulted in....

Cecil
----- Original Message ----- 
From: <wb5uom at hughes.net>
To: "rbethman" <rbethman at comcast.net>; <R-390 at mailman.qth.net>
Sent: Sunday, August 02, 2009 5:44 PM
Subject: Re: [R-390] Grounds


> This has been good reading. Thanks!
>
> I have 23 tower installations of my own and cant cout how many more of
> Customers sites that we take care of . Ive got some sites grounded to the
> hilt and still take hits from time to time. I have others with no 
> grounding
> at all that never get hit.
>
> There was(is) this large oil company, and several years ago they had a new
> Communications Manager take over. He had been in the Middle East for years
> and came in to our office one day requesting a "tour" of his sites in this
> area.
>
> The first words out f his mouth upon entering one of the radio Comm
> buildings was "Get those grounds off my equipment. I do not want  any of 
> my
> equipment OTHER THAN the shield of coax's grounded at the point of entry 
> on
> the outside of the building."
>
> And I have to say, it did not seem to get any worse afterwards and  it is
> still that way today.
>
> David/WB5UOM
>
>
> ----- Original Message ----- 
> From: "rbethman" <rbethman at comcast.net>
> To: <R-390 at mailman.qth.net>
> Sent: Sunday, August 02, 2009 5:19 PM
> Subject: Re: [R-390] Grounds
>
>
>> This is a "rough" play for Amateur Radio installations.
>>
>> Tisha provided EXTREMELY GOOD reference material!
>>
>> Consider it a PERMANENT fixture on my site!
>>
>> Bruce, Dave, Dave, Cecil, myself, and others have contributed 
>> information.
>>
>> Roger pointed out the power dissipation being measured in Joules.  Some
>> strikes will boggle the imagination!
>>
>> Bruce spoke of STILL losing some items.  I don't think it IS possible to
>> be absolutely safe from a strike no matter WHAT we do.
>>
>> Do YOUR *BEST*!
>>
>> Bob - N0DGN
>>
>> Bruce Ussery wrote:
>> > <SNIP>
>>
>> > Experience helps I imagine.
>> > Thanks to all for the good information.
>> >
>> > Bruce
>> > WA4ZLK
>> >
>> > Dave Maples wrote:
>> >
>> > All: The NEC is correct in this case.  All the grounds need to be
> connected
>> > together with large-gauge wire, so that any surge current (whether
> direct or
>> > induced) cannot set up a large potential difference between the ground
>> > systems.
>> > <SNIP>
>> >
>>
>> > This is a large condensation of guidance we received from both
> Polyphaser
>> > and equipment vendors.
>> >
>> >
>> >
>>
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>
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