Re: NorCal Teslathon -- Interesting Devices and Effects

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

Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Greg, All

About 6-7 yrs. ago Richard Hull, Alex Tajnsek and I setup a small
 machine Richard's lab and placed about 6 feet away a resonator
with the base tied to a "local" ground.  "Free" resonator was capacitively
loaded with toroids until resonant with operating system.  A aluminum
sheet was placed between both coils, but isolated (i.e. not tied to ground).
Response of free coil was reduced to about 1/3 of original response with
no intervening sheet.  When sheet was grounded, free coil output was killed.
This experiment validates your position that the response is predominately
electrostatic in driving free coil systems.

Regards
Dave Sharpe, TCBOR
Chesterfield, VA. USA

Tesla list wrote:

> Original poster: "Greg Leyh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<lod-at-pacbell-dot-net>
>
> Regarding how the power might be coupling to the passive coil,
> I tend to discount coupling thru the ground connection, since
> the ground is only rising 1oo's of volts at best, and the Q of
> a loaded secondary (one with an arc hanging off it) is usually
> far less than 100... The req'd resonant rise just isn't there.
>
> Magnetically, I can't see 1,8oo watts coupling that far either.
> The toroid, which is *much* more closely coupled than the other
> coil, doesn't seem to experience any measurable inductive heating,
> and whether the toroid is a shorted turn or not doesn't seem to
> impact the operation of the coil in any noticable way.
>
> Electrostatic coupling seems to be the most plausible theory
> so far.  The secondary C is effectively around 130pF. If even
> only 1% of that C is linked to the other toroid, then that
> would account for around 200 watts... perhaps more if resonantly
> coupled.
> --
>
> -GL
> www.lod-dot-org