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Re: [TowerTalk] Ground rod to ground window connection?

Subject: Re: [TowerTalk] Ground rod to ground window connection?
From: K4SAV <>
Date: Wed, 31 May 2006 19:04:38 -0500
List-post: <>
I would answer your question, but I couldn't figure out what it was, so 
I will just give you some information.

A ground rod for a dipole with a polyphaser will probably be OK to 
protect against induced voltage from close lightning strikes, but it 
will be worthless if you get a direct hit.

I hate to scare you with this, but you should know the risks.  You have 
to weigh this against the frequency of lightning in your area and the 
probability of getting hit.

Assuming this is a dipole with no center mast support, here are the most 
probable results if you get a direct hit. The lightning will vaporize 
your feedline.  It will then travel down the ionized trail where the 
feedline was, completely ignoring the ground rod, and follow the trail 
into your house, where it will find the closest real ground, either a 
water pipe, electrical system wiring, rebar inside concrete blocks, or 
all of the above.  Most everything in your shack and house will be toast.

This is based on observations, having spent 38 years in the center of 
most dense location for lightning strikes in the US.

There is a way to provide protection for a dipole, but it isn't simple. 
You have to erect it using a center conductive mast, then add a ground 
system, the same way you do for a tower.

Jerry, K4SAV

David Shelton wrote:

>I have an eight foot copper clad ground rod about 15ft from my ground
>window, polyphaser, on the entrance to my shack from the outside. I am
>looking at the best way to connect these two. I would like to use #4 or #2
>ground wire. I have in the past used the 1 ½ inch ground strap that
>polyphaser sells. My antenna is a Carolina Windom 160 that is not up yet as
>I have recently changed QTH. 
>David, N4IN
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