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Re: [TowerTalk] Lightnig Arrestors at tower base or house entrance?

To:, Glenn Thorne <>
Subject: Re: [TowerTalk] Lightnig Arrestors at tower base or house entrance?
From: Gene Smar <>
Date: Mon, 25 Feb 2008 15:06:32 -0600 (CST)
List-post: <">>

     I installed my Polyphasers at the bottom of my tower in a steel box 
because I also have a coax switch in there.  If I had installed the Poly's at 
the shack, I would have left the switch inputs and the coax runs from the 
antennas into the switch unprotected.  

     I also have a more robust ground system near the tower:  three runs of #2 
solid connected to 12 ground rods.  Near the shack end of the coax I have only 
one ground rod that connects to one of the three tower ground leads.  So to my 
way of thinking (I didn't measure it), the ground impedance near the tower 
(three ground leads) ought to be lower than near the shack (one ground lead).  

     I suppose the answer to your question <Which is better?> depends on 
whether you have a continuous coax run from antenna to shack entrance, or 
whether you have intervening equipment along the way.  Of course you can go the 
belt-and-suspenders route by having Poly's at both points.  I chose not to.  

73 de
Gene Smar  AD3F
P.S.  I believe W1AW uses the same technique as I do - Arrestors at the tower.  
I forgot the date of the QST article where I read this.

From: Glenn Thorne <>
Date: 2008/02/25 Mon AM 11:03:06 CST
Subject: [TowerTalk] Lightnig Arrestors at tower base or house entrance?

I've seen descriptions and pictures of installations where lightning arrestors 
were installed in a weather proof box at the tower base and others where they 
are at the house entrance.  Which is better?

I plan on having the coax shied grounded at the top of the tower, bottom of the 
tower and at the house entrance.  But where is the best place to put lightning 
arrestors?  The run from the tower to the house will be about 30 ft. and will 
be buried.  


73, Glenn/KD0Q

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