Re: Mini coil earth?

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

Original poster: Jim Lux <jimlux-at-earthlink-dot-net> 

At 03:49 PM 10/3/2003 -0600, you wrote:
>Original poster: "kayaker" <kayaker-at-sbcglobal-dot-net>
>Hello All:
>
>A newbie question. What is a counterpoise on the secondary.
>
>Doug


Fancy name for an artificial ground plane.  Rather than have your coil sit 
on the "ground" and hook it to a "ground rod" to electrically connect it, 
you sit your coil on a conductive sheet (artificial ground).  Most of the 
electric field "connects" to the ground within a circle of radius=height of 
the top of the coil (total height, not length of secondary) above the 
ground plane.