Re: Spherical discharge terminal

From: 	Mike Hammer[SMTP:mhammer-at-misslink-dot-net]
Sent: 	Monday, June 23, 1997 4:57 PM
To: 	Tesla List
Subject: 	Re: Spherical discharge terminal

At 03:42 PM 6/22/97 -0500, you wrote:
>From: 	Esondrmn-at-aol-dot-com[SMTP:Esondrmn-at-aol-dot-com]
>Sent: 	Friday, June 20, 1997 9:07 AM
>To: 	tesla-at-pupman-dot-com
>Subject: 	Spherical discharge terminal
>There was some discussion here a while back about the different effects
>produced by using round v.s. toroidal discharge terminals.  Last night I
>placed an aluminum foil covered styrofoam ball (about 6" in dia.) on the top
>of the toroid of my 3" coil.  When running, for the first several seconds,
>the discharges are similar to using the toroid - dancing around the ball and
>many forked like normal, then after maybe 20 seconds it settles down to just
>one streamer going straight up.  This one streamer walks around the ball
>somewhat but has no forks in the discharge except at the very top.  It goes
>straight up for about 16" to 18" then produces many forks at the top.  I have
>never seen this before.  It reminds me of a tornado in appearance.
>Has anyone tried this on a larger, higher powered system?  That would be
>something to see a single discharge going straight up for seven or eight
>feet.  This would probably only work outside with absolutely no wind.
> Something else for me to try when I eventually get some new capacitors for
>my 6" coil.
>Ed Sonderman

I have had this same effect many times. I have only noticed
it while using a spherical terminal.

While my coil is not really high power I have had this single
snake like streamer out to about 28 inches. I have had them last
up to 30 seconds. Any air movement seems to disrupt it.

What I notice if one begins while I have the variac setting rather
low is that more power tends to make them thicker rather than longer.
I have had them as thick around as my thumb.

Very unusual and interesting effect.

Mike Hammer