Re: Rock ground

Subject:     Re: Rock ground
      Date:  Thu, 05 Jun 1997 04:53:56 GMT
      From:  jim.fosse-at-bjt-dot-net (Jim Fosse)
        To:  Tesla List <tesla-at-pupman-dot-com>
References:  1

On Wed, 04 Jun 1997 07:30:44 -0500, Tesla List <tesla-at-pupman-dot-com>, you

>Subject:     Rock ground
>      Date:  Tue, 03 Jun 1997 03:37:22 -0400
>      From:  "Kevin M. Conkey" <teslacoil-at-mindspring-dot-com>
>        To:  Tesla List <tesla-at-pupman-dot-com>
>References:  1
>I live in Mi where the grounding rods in the ground are no problem. What
>would one do for a good Tesla system ground if you lived in Arizona? The
>ground there is hard rock (no basements there!).

        The same "ground" that I used as a "Ham" radio operator in the
HI-desert of Southern California, where I lived on-top-of ~5000' of
dry sand. Use a counterpoise -- a large metallic object as a ground.
Typically, this consists of many (16 or more) 1/4 wavelength wires
radiating out from your ground point. (this works well for the ham
bands of 40- meter wavelengths (7,000+ kcs;) but might be a bit large
for TC frequencies: 300/0.1mHz -> 3/4km)



p.s. I couldn't resist the kilocycle per second units of frequency in
spite of my admiration of Herr Hertz;)