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Re: [TowerTalk] Grounding the coax

To: towertalk reflector <towertalk@contesting.com>
Subject: Re: [TowerTalk] Grounding the coax
From: Alan NV8A <nv8a@att.net>
Date: Thu, 03 Nov 2005 23:53:47 -0500
List-post: <mailto:towertalk@contesting.com>
I must be getting old, Gene. I looked back and saw that I had already 
marked that previous message of yours for further attention but then 
forgot that the subject had been raised at all.

73

Alan NV8A


On 11/03/05 11:38 pm ersmar@comcast.net tossed the following ingredients 
into the ever-growing pot of cybersoup:

>      I ran into the same issues when installing my coax grounds on my tower.  
> The most vexing to me was the price for commercial straps.  So I devised my 
> own using copper flashing and posted here on TT at:  
> http://lists.contesting.com/archives//html/Towertalk/2005-10/msg00778.html .  
> (Make sure you paste the entire URL into your browser.)
> 
>      One significant advantage (to my way of thinking) to this approach to 
> shield grounding is that you don't introduce another pair of potential 
> failure points - the two PL-259s - into the coax system.  

>>In his articles on lightning protection in QST in 2002, Ron Block KB2UYT 
>>emphasizes the need for grounding the coax at the top and bottom of the 
>>tower (and perhaps at intermediate points, depending on the height of 
>>the tower). I doubt that anybody will argue with this, but the question 
>>is how?
>>
>>Polyphaser sells expensive kits for grounding the coax: hefty 
>>semicircular hunks of copper that are clamped around the coax shield 
>>after removing its outer covering, then grounded to the tower by wide 
>>copper straps. Of course waterproofing is then applied to the coax where 
>>the outer covering was removed.
>>
>>But would simply interposing a barrel connector and securing a ground 
>>wire to that with, say, a hose clamp, then connecting that ground wire 
>>to the tower be significantly worse? Again, of course, the section with 
>>the barrel conenctor and PL-259s (or whatever) would have to be well 
>>sealed against the weather.
_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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