Re: SSTC output looks more like SGTC output!

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

Original poster: "Steven Ward by way of Terry Fritz <teslalist-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>

THe power level was pretty low.  My ammeter would say maybe 7A at only 35V 
(but its a silly clamp meter).  This coil draws about 15A at full 120V, and 
i was set to 20-30% befor i got arcing between the primary and 
secondary.  I cant say much about the 5khz noise.  Im not too sure about 
it.  Also, the toroid was a home made one that used a styrofoam core (spun 
on a drill and shaved).  Its more like an oblate than a toroid, but very 
smooth.  I did use a breakout point.  When i got too close, i could feel my 
face tingle! small sparks were going from my glasses frame to my skin.  Im 
afraid of what it would radiate without the breakout!  For now im retiring 
the large toroid.
It kind of scares me.

Steve Ward.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: SSTC output looks more like SGTC output!
>Date: Thu, 19 Jun 2003 21:38:45 -0600
>
>Original poster: "jimmy hynes by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
><chunkyboy86-at-yahoo-dot-com>
>
>What is the power input? My guess is that the toroid voltage reaches the 
>breakout voltage 5000 times per second, so its kind of like a SGTC with a 
>really high break rate. What happens at lower power? I would imagine that 
>the 5 khz would slow down, and that the toroid voltage would get a little 
>higher because of the longer cooling time. I said that this might happen a 
>few weeks ago, in the thread about spark length vs coupling, but I was 
>hoping it would do the same thing for streamers. Is the toroid spunm, or a 
>rough home made one?
>Tesla list <tesla-at-pupman-dot-com> wrote:
>Original poster: "Steven Ward by way of Terry Fritz "
>
>I hope this isnt "old news", but i did something recently that might be of
>interest for those of you who like to analyze things. Recently, i built a
>full bridge for my SSTC (1.5KW). I was running it with a 4.5x15" winding
>of 30awg and a small toroid (7x1.25"). This made the typical humming
>hissing sparks that are ghostly yellow/white when you draw ground
>sparks. Just about an hour ago :) i made another secondary. This one is
>4.5x19" 30awg.
>I tried putting a big toroid (5x16") on it. At only 30% input, the sparks
>were loud, crackling, bright white streamers about 9" long! They only
>appeared this way with ground strikes. The corona output (streamers only)
>were still purple and looked like an SSTC. I could not crank up the juice
>because of flasho! ver problems. But this makes me wonder if perhaps the
>larger toroid is in fact charging up like a capacitor and then releasing
>the energy in one bright SGTC like spark. The sparks also had a 5khz'ish
>squeal to them. I wonder what would happen if i could run it up to 120V
>input.
>Maybe the thing would look just like a SGTC. It sure was loud like one.
>Oh, and ozone production went sky high!!!
>
>Another thing to note is the apperance of the RF envelope. When not
>drawing sparks, it looked like a pretty much round blob (the common
>look). But when pulling arcs, the blob turned into a series of very short,
>but equal in amplitude blobs. Seems like each blob was an output spark,
>and would explain the 5khz noise maybe.
>
>Any thoughts? Maybe someone wants more information? Please let me know,
>im kind of interested in this!
>
>Steve Ward
>
>_
>
>
>
>Jimmy