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Re: [TowerTalk] CDwelding a tower leg

Subject: Re: [TowerTalk] CDwelding a tower leg
From: Jim Lux <>
Date: Mon, 17 Sep 2012 12:02:31 -0700
List-post: <">>
On 9/17/12 10:49 AM, David Gilbert wrote:

I'm certainly no expert on lightning, but I thought that that idea you
could avoid lightning strikes by dissipating static from the clouds
above had been debunked as nonsense years ago.

Yup.. that cloud has more charge stored in it than any little rod is going to be able to discharge by means of corona or similar.

 A lightning rod may
offer some protection to the structure by being the most attractive
target for a strike, but I doubt that it significantly reduces the
probability of a strike.

That is, in fact, how lightning rods work.. it's higher than everything else around it, so it's preferentially hit. Might even increase the probability of a stroke.

 Most likely other members of this list are far
more knowledgeable on that than I am.

The bottom line, though, is that just because you've never had a problem
it doesn't mean that your system is properly engineered to avoid one.
Maybe it is, maybe it isn't, but we hear the same thing from hams who
put up 60 feet of Rohn 25 without guying it ...

Anecdote is a bad basis for engineering design, in general.


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