Re: Sword-like VTTC spark pix at my website

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

Original poster: "Hans Scholze by way of Terry Fritz <twftesla-at-uswest-dot-net>" <hanscs-at-eagle.ptialaska-dot-net>

John,

That is really neat!  If you don't mind, I'd like to ask a few questions
about your setup.  When you say the coil is pulsed, would that be similar a
120 bps gap in a disruptive coil, or are you using much lower or higher
pulse rates?  Looking at the pictures, I would think that the dimple in the
top of the e-field of the torid combined with the breakout point caused the
sparks to be perfectly vertical.  Is this correct, and if so can the effect
be duplicated with a "conventional" coil.  If I place a breakout point on
the top of my small coil with a spherical topload, I get something similar,
but the arc usually branches a few times and waves around.  I estimate the
breakrate of my static gap to be about 400.  Thanks for sharing that with
the group.

Hans

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, February 06, 2001 6:38 PM
Subject: Sword-like VTTC spark pix at my website


> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<FutureT-at-aol-dot-com>
>
> All,
>
> I've posted a couple photos of the straight swordlike sparks from my
> staccato VTTC at my tube coil webpage at:
>
>     http://hometown.aol-dot-com/futuret/page2.html
>
> The sparks look the same by eye as in the photo, except for a
> slight undulating of the spark, and of course pulsing, if the pulse
> rate is slowed down.
>
> The coil secondary is 3" by 12", topped with a 6" toroid.  The
> tubes are (2)  833A.  Powered by an MOT with shunts removed,
> and Dave Sharpe's level shifter circuit.  Max spark length is 24",
> but I have it turned down to about 21" in the photo.  The spark
> tends to dart around a little at higher powers, making it hard to
> photograph.  At faster pulse rates, the sparks take on the normal
> torch like VTTC appearance.
>
> John Freau