Re: Isis and Osiris--Victory At See

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

Original poster: "Nicholas Field by way of Terry Fritz <twftesla-at-qwest-dot-net>" <nick.field-at-hvfx.co.uk>

> Antoine, Ed, Nick
>
> The Twins produced a 73 inch spark today with lots of wasted energy
> streamers coming from the toploads. The spark is more blue than white
> and it is not at all steady. A problem is that one topload is 29 inches
from
> the clothes washer and both are only 27 inches below the duct work and
> conduits. I think improvements can still be made.

Excellent!  Given the close proximity of the toroids to the ceiling that's
certainly impressive.   Are you using breakout points?

> I have a length of bare # 12 wire, the ends of which are connected to the
> secondary bases. I can move the powerline ground tap along this wire. Now
> that the coil is decently
> tuned I am unable to find any evidence of the "ground tuning" effect. The
> electrical
> zero point does not shift. This effect was definitely noticed when I was
> tuning the
> primaries. I consider that question very much open for more
experimentation.

The few feet of bare wire is small compared to the wavelength, so I
wouldn't
expect to see any noticeable 'ground tuning' along its length.  The effect
can
simply be demonstrated by removing the toroid from one coil and tuning in
slightly.  If you leave the midpoint ungrounded, you'll see a lovely display
as the
ground cable arcs to the floor.

At the debut of my first twin, Fred & Wilma a fierce arc developed between
the ground cable and the floor.  Sufficient voltage was developed across the
ground to burn not only through the tri-rated insulation, but also a large
section of the 6mm˛ copper conductor.  Unfortunately from my position behind
the control unit I didn't see the arc until I smelt it!

> The coupling is adjusted by sliding the secondary up and down on a smaller
> diameter
> piece of pvc. The coefficient of coupling is very high. When I checked the
> range of k
> using Terry's method the coil was untuned. But with the sec fully lowered
> into the
> primary, (a solenoid tuned from the bottom up) the high k was nearly 0.3.

> Now, with a decently tuned coil, the secs are nearly fully lowered to
maximum
> k but there is no pri-sec arcing and no racers. Maybe I can reduce the
> diameter of the primaries by an inch?

That's certainly a high k for a classical coil.  What sort of gap are you
running?

> The process of tuning the TWO series connected primaries to an F res = to
F
> res
> for EACH secondary is a mystery to me. The secret may be in the M mutual
> inductance

My hypothesis too.

Safe Coiling
Nick

_______________
Nicholas Field
Director,  HVFX
www.hvfx.co.uk

> Happy day,
> Ralph Zekelman
>
> As long as I can keep the sparks out of the washer and off of the ceiling,
> this beast
> may be capable of greater spark length.
>
>
>
>