[Prev][Next][Index][Thread]
Re: T-coil discharge - plasma sphere (fwd)
Date: Sat, 15 Nov 1997 15:08:46 -0700
From: Bill Noble <william_b_noble-at-email.msn-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: T-coil discharge - plasma sphere
the effects you describe are the same as I get with a commercial plasma
sphere I have - it's made by one of the artists that started making these
about 10 years ago, and it has a couple of controls that affect the
frequency and duty cycle (I presume) of the excitation voltage. By
adjusting these controls I can get all sorts of patterns, including those
described below. I'll bet there is some relationship, and it's much easier
to investigate with a low power plasma sphere.
>
>From:
Benson_Barry%PAX5-at-mr.nawcad.navy.mil[SMTP:Benson_Barry%PAX5-at-mr.nawcad.navy.m
il]
>Sent: Saturday, November 15, 1997 6:02 PM
>To: tesla-at-pupman-dot-com
>Subject: Re: T-coil discharge
>
>
>HI All,
> I have produced these interisting discharges on a
>toroid in the following way. I used a 24 electrode variable
>speed rotary gap. As I increase the speed the discharges
>become longer and fewer to a point. Then they start
>becoming shorter and thicker. At this point the discharge
>coalesces on the top of the toroid as a single writhing
>rope like discharge with small forks at the tip. As I increased
>the rotary speed the discharge broke up into many small
>spike like streamers. I also noted a resonance effect
>associated with the rotary speed set to the writhing
>discharge mode. The image on the screen of a camera
>plugged into the same supply line as the coil stopped
>jittering and being noisy. It became absolutely still.
>I believe that the break frequency was some higher
>harmonic of the 60 Hz line frequency.
>
> Barry
>
> ----------
>From: "tesla"-at-pupman-dot-com-at-PMDF-at-PAXMB1
>To: Benson Barry; "tesla"-at-poodle.pupman-dot-com-at-PMDF-at-PAXMB1
>Subject: Re: T-coil discharge
>Date: Thursday, November 13, 1997 10:58PM
>
>
>
>From: Esondrmn-at-aol-dot-com [SMTP:Esondrmn-at-aol-dot-com]
>Sent: Thursday, November 13, 1997 1:25 PM
>To: tesla-at-pupman-dot-com
>Subject: Re: T-coil discharge
>
>In a message dated 97-11-13 09:05:00 EST, you write:
>
><< Kevin---
>
> I read with interest, your description of the discharge from your coil
> sometimes forming a long slowly moving single tendril. I once built
> a small coil (back about 1962) that used a 9 KV 30 ma. neon xformer
> with two 0.01 mfd 8 KV mica caps in series connection with a 6 segment
> stationary series gap. The Tesla primary was 12 gauge wire in the
> >>
> -snip-
>
>Bill,
>
>I have not seen this on either of my coils when using a toroid for the
>discharge terminal. I have set a 6" dia aluminum foil covered styrofoam
>ball
>on the center of the toroid on the small 3.5" dia coil. It sits up about
3"
>on a metal support right in the center of the toroid. When first powered
>up,
>the discharges will wander around on the ball but after maybe 10 to 15
>seconds will finally start going straight up for maybe 16 to 18 inches with
>only short branches at the top. It is interesting to watch. I think the
>rising heat and no air movement (running in the basement) has something to
>do
>with it. I would like to see this on my large coil - something that can
put
>out 5 to 6 foot discharges, but I can only run that coil outside and have
>not
>tried it.
>
>Ed Sonderman
>
>
>
>
>