Re: Rock salt and RF grounds (fwd)

---------- Forwarded message ----------
Date: Thu, 16 Jul 1998 00:43:42 -0700
From: lod-at-pacbell-dot-net
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Rock salt and RF grounds (fwd)

> > On Electrum we packed each of the 8 ground radials with
> > Bentonite clay, which is somewhat conductive and harbors
> > moisture around the radial element.  The total R to the
> > earth for this array was measured at 0.44 ohm, and seems
> > to hold up well.
> >
> > -GL
> Why bentonite? It's quite dense and has interesting flow properties in a
> slurry making it useful for drilling mud, but I wouldn't think that very
> relevant for a grounding. Were you looking for something absorbent, and
> it happened to be available at a low price (like you could dig it up
> somewhere else for free?).

Yes on both counts.  We needed quite a bit to fill the eight
50' trenches. 

> Clays, in general, have fine particles which
> make them good for grounding rod kinds of applications according to one
> of my references. For instance, would Fuller's earth or diatomaceous
> earth work as well?

I suppose they might, if they harbor moisture in the same way.