Re: primary close to ground?

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

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 

The primary creates large H fields (magnetic fields) that point up and down
to couple into the secondary windings.  If the strike rail is closed,  these
H fields will couple into the closed loop of the strike rail and create eddy
currents that will kill the H field.  The closed loop will act like a
shorted secondary.  Never close the strike rail and leave a sufficient gap
so induced voltages in the strike rail will not arc across the gap.  Also,
if a ground plane is under the primary and too close,  it too will conduct
eddy currents that will kill the H field.

Gerry R
Ft Collins, CO


 > Original poster: Beans45601-at-aol-dot-com
 >
 > I have seen a lot of coils that have the primary only a couple of inches
 > from the ground, and the components around it. Doesn't the primary this
 > close to ground affect the output of the coil? It seems if a strike rail
 > (that was a complete circle) can draw power from the coil, that the ground
 > that close would draw lots of power from the coil.
 >
 > Thanks
 > Adam
 >
 >