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Re: [TenTec] OT: Lightning and Grounds

To: tentec@contesting.com
Subject: Re: [TenTec] OT: Lightning and Grounds
From: "Richard Detweiler" <rdetweil@hotmail.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 30 Jun 2005 21:54:47 -0500
List-post: <mailto:tentec@contesting.com>

1. I've often wondered what would happend with a lightning strike nearby
and everything connected together (as at my QTH): coax feed line ground
block; phone; AC main; AC outlet strip for radios; radios' bus bar ground.

If the path to ground has less resistance than through your equipement, then 
lightning won't go through your station to get there.  A well thought out 
system will divert the lightning strike to ground where it belongs....

I use a vertical and a dipole on the fence.  I beleive my system has taken a 
couple of lightning hits.  The hits so far have resulted in no damage at all 
to my radios, antennas or feed lines.  The last hit had so much E wave that 
I lost my home network,  had to replace 1 of the high speed switches and two 
lan cards in PCs..    No damage at all to anything else.  I don't think the 
lighting is hitting my antennas or house.  I think it is hitting directly on 
my grounding system......

My lightning protection system includes several ground rods at the antennas 
and at the entry point, then 1 foot long copper pipes drove into the ground 
about 8 foot apart all the way around the house with bare coper wire between 
all of the ground rods and copper stakes.  by the way the extra grounding 
adds a couple of S units on the signal reception too.  Then lightning 
arestors for 2Kw on the feed line at the antenna ground and radial system 
and also at the entry point grounds of the house.    Over kill maybee, but 
seems to work.  A few good articles shows how all this comes together...

Best wishes,

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