Re: Mini coil earth?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Street signs work great for a counterpoise. They lay flat and are rugged. I 
use either a flat square plate (Do Not Enter) or a flat circle plate (RxR) 
mainly for certain measurements. These signs are 30" across and perfect for 
the task. Prior to these "finds", I simply used Al-foil layed down under 
the coil which worked just fine. The street signs, however, are the perfect 
counterpoise for many coils (plop it down and setup the coil).

Bart

Tesla list wrote:

>Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
>Tesla list wrote:
>
> > Original poster: Thomas <tom-at-pwrcom-dot-com.au>
> >
> > I would like to build a portable mini coil that can be used for indoor
> > demonstrations, where an RF earth is not available.
> >
> > Is there a way to safely operate a mini coil (NST 6kV 30mA supply) using
> > only the building earth?
>
>Use a "counterpoise". Just a big metal plate lying in the ground. I use
>one with about 40x70 cm, or a metal bucket, without any problem, with
>a 5 kV 30 mA NST.
>
>Antonio Carlos M. de Queiroz
>
>
>
>