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Re: How with no RF ground?



Tesla List wrote:
> 
> >From bturner-at-apc-dot-netWed Sep 18 23:47:13 1996
> Date: Tue, 17 Sep 1996 23:22:54 -0700
> From: open_minded <bturner-at-apc-dot-net>
> To: tesla-at-pupman-dot-com
> Subject: Re: How with no RF ground?
> 
> Tesla List wrote:
> >
> > Bob,
> >
> > Any chunk of metal can act as a ground counterpoise.  With the small
> > transformer of your coil a relatively small metal object would act as a
> > couterpoise.  When running though, you could get a nasty little RF burn
> > from too small a counterpoise.  If you increase your power, you will
> > eventually overcome the counterpoise and it will issue spark to air.
> >
> > Richard Quick used to use one of his dads old Lincoln automobiles as an
> > excellent counterpoise (insulated on tires).  He also used a metal plate
> > at one time and as he up his power it arced to ground.  We have had a
> > similar discussion in the recent past about a railroad track, I believe.
> >  Were you on line then?  You do not need a grounded object for an RF
> > ground!!!!  Just an object!
> >
> > I dare say that a few hundred tons of metal on glass insulators 100' in
> > the air would be a far better RF ground for high power systems than 10
> > -12' ground rods hammered deep within in the earth!!
> >
> > Richard Hull, TCBOR
> 
> OK - I vote that we take up a collection and buy up a whole bunch of
> junk automobiles (ie: old pre-80's road boats) and make one. Make a
> sort of arial counter-poise / automobile modern sculpture. Perhaps
> charge admission to pay the electric bill???
> 
> - Brent ;-]


The ideal counterpoise would be boring and threading a 1" diameter hole 
in the deck of the battleship Missouri while at anchor in a nice salt 
water port.  I don't think there would be a detectable difference even in 
dry dock.

Richard Hull