Re: Natural streamer :)

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

Original poster: "cd by way of Terry Fritz <twftesla-at-qwest-dot-net>" <vbprg1-at-hotmail-dot-com>

my recent research has lead me to several bits of data concerning vdg output

humidity plays a big part in spark length for both VDG and TC

also spurs or sharp points have a much bigger effect towards discharge on a
VDG
meaning if you put a breakout point on VDG your likely to never see a spark.

Since the VDG relies on the the belt to generate charge any conductive dust
on the belt will serously affect performance

also the roller material makes a big difference on what you get out of your
VDG
(with out conducting my own tests I would assume materials at the ends of
the spectrum would produce More or greater VDG output)


Materials that tend towards a Positive Charge

More      Air
Positive  Glass
          Nylon
          Wool
          Lead
          Aluminum
          Paper

          Neutral

          Cotton
          Steel
          Wood
          Rubber
          Copper
          Acetate
          Polyester
          Polyurethane
          Polypropylene
          Vinyl (pvc)
More      Silicon
Negative  Teflon

Materials that tend towards a Negative Charge

the above and more good info at
http://www.edm-dot-net/~pmiller/van.txt

I am still  doing research and am seriously looking for Information
reguarding
VDG built on the Electron Injection system model. I am contemplating on
building another very small tesla coil to directly inject electrons onto a
VDG belt. At least I believe this is how a injection system is done, still
looking for good info on injection VDG systems.

Once again I am not the best person to ask, I just collect the data then try
to use it, but I hope that helps....
Chris Dowdy


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, July 16, 2002 9:07 AM
Subject: Re: Natural streamer :)


> Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<srward16-at-hotmail-dot-com>
>
>
>
>
> >
> > When I run my "big" [18" sparks, but only 35 microamps short-circuit
> >current] VDG everything within several feet stars to show visible
> >discharge.  If they sharp points are close there isn't much voltage
> >rise.  If I approach it with my hand I'm liable to get zapped, but if I
> >hold a pin in my hand [pointed toward the terminal, of course] and
> >approach nothing much happens.  Same phenomenon.
> >
> > "St. Elmo's fire" is another manifestation of the same sort of thing.
> >
> >Ed
>
>
> Wait a sec!!  Your VDG can give 35uA but can only give an 18" spark??  I
> tested my VDG to have only about 7uA and can give about 22-24" sparks.  My
> sphere is a 14" oblate made from salad bowls with about 4 rolls of
> electrical tape around the rim.  Works fairly well with only a 3" wide
belt.
>   I wonder why your machine has so much power but no big sparks (well big
> but not huge).
>
> Steve Ward.
>
>