[TowerTalk] Grounding Question

[Jim W7RY]

If you would like to see how the professionals do it, take a look here:

http://www.maplenet-inc.com/grounding

Motorola's Communications Site Ground Standards know as R56, are all written 
around the NEC and TIA/EIA standards. As well as many MIL documents.  I 
happen to work for one of the authors.

W8JI has some good stuff on station grounding. www.w8ji.com

Do some Google searching on Motorola R56 or tower site grounding or ham 
station grounding etc. You will find lots of info.

73
Jim W7RY
Motorola


--------------------------------------------------
From: "Jim Brown" <jim at audiosystemsgroup.com>
Sent: Friday, March 25, 2011 10:00 AM
To: <towertalk at contesting.com>
Subject: Re: [TowerTalk] Grounding Question

> On 3/25/2011 6:08 AM, Larry Libsch wrote:
>> I must be misunderstanding  something . How do I attach my
>> coax shield to the outside common point and also attach it to my radio
>> inside the shack?
>
> Since I wrote the grounding chapter for Steve's book, I'll attempt to
> clarify.
>
> One ancient and accepted method of accomplishing this is often called a
> "ground window," where coax cables go through lightning arrestors
> (Polyphaser, ICE, etc.)  that are bonded to a conductive plate (usually
> copper) where they enter the building, and that plate is bonded to the
> ground system.  The coax from the antenna has a PL259 that screws to the
> arrestor on the outside of the wall and a coax jumper with PL259s on
> both ends goes between the arrestor and the radio.
>
> Several brands of arrestors are sold in "feed-through" form, so that the
> plate can be installed in a wall (or an actual window). There's nothing
> magic about the feedthrough arrangement, it's just a mechanically neat
> way to do it.
>
> The MOST critical part of all of this is the bonding together of ALL
> grounds associated with your home and shack -- power service entrance,
> shack, CATV, telco, other lightning arrestors, building structure, all
> ground rods, etc.
>
> 73, Jim Brown K9YC
>
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