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Re: LF: Re: Static effects

To: [email protected]
Subject: Re: LF: Re: Static effects
From: "Dr. Tom Gruis" <[email protected]>
Date: Tue, 19 Jun 2001 14:10:00 -0500
Organization: www.gruis.org & KØHTF
References: <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>
Hello from Iowa in the US - EN31!

        As a personal opinion and preference and based on a long period of time
of radio experimentation, NEVER have ANY antenna without some type of a
DC path to ground at ALL times!

        Static drain resistors are a must, unless the whole antenna is at earth
potential as in the case of a VHF J-pole or such. Spark gaps are good.
Neon lamps are good. Grounding switches are good. Etc...

        Remember, if the lightning bolt can jump a mile or three through the
atmosphere, a few inches, or a number of feet, ot even most insulation
will be effectively a non impediment to the strike.

        If there is a direct hit - then that is apt to be that!

        I have worked at many broadcast stations, AM, FM, and TV and have been
near the tower when it/they have been struck. They are "built to take
it." Usually I have felt very safe there. But such massive structures
and extensive ground arrays are not likely to be found in the
amateur/experimenter sector!

        The incident of old Ben Franklin and his flying a kite in an electrical
storm illustrates many scientific principles, to be sure.
        One other and usually overlooked principle is that of blind luck!!!

73,

Doc.


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