Re: PlasmaSonic SSTC II

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

Original poster: "Steven Ward" <srward16-at-hotmail-dot-com> 


Note that SSTCs often use SMALL toroids!!!  Whenever i tried a large SGTC 
toroid, my SSTC driver did not like it at all!!  And, the larger toroids 
seem to promote flashover between a tightly coupled primary and secondary.
I like to use small toroids using 1.5" diameter tubing and diameters 
ranging from 6"od to 12"od.  I know dan uses slightly larger toroids,but 
his secondary coils are also much taller than mine.  Just something to keep 
in mind!

Steve Ward

>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: PlasmaSonic SSTC II
>Date: Tue, 30 Sep 2003 13:02:59 -0600
>
>Original poster: dhmccauley-at-spacecatlighting-dot-com
>
>
>You'll need a different primary winding.  Spark gap tesla coils utilize very
>loosely coupled primary coils.  SSTC coils on the other hand require very
>tight coupling.
>The secondary and toroid can remain.  All you need to do is get a slightly
>larger diameter PVC pipe, put about 12-15 turns (no tuning required) around
>this pipe, and slide over your
>exisitng secondary.  Thats it!
>
>For voltage, if you are planning on running half-rectified (no audio
>modulation), then 240VAC should work great and that is what i'm specifying
>the maximum "tested" limit on the boards.
>You can try other voltages, but other voltages have not been verified by me.
>That doesn't say they won't work though.
>
>For audio modulation, i would specify 140VAC tops for input to your
>bridge-rectifier filtered DC supply.  This will yield about 170-200VDC
>depending on your input voltage.
>
>Dan
>
>
> > I just ordered one of these boards and I'm looking foward to experimenting
> > with it.
> >
> > Can we run the SSTC circuit board with an existing spark gap tesla coil,
>or
> > does it need a differnent primary winding.  I was thinking of
>disconnecting
> > the primary capacitor, filter, power source and connecting the driver
>board
> > up to the primary copper tubing spiral.  This would make things so easy.
>Is
> > it this simple??
> >
> > The other thought I had was to get more voltage to the board.  I have a
>120
> > volt isolation transfomer, actually it will do 120V to 140V.  If I connect
> > the one secondary lead to the neutral power wire and take the output off
>the
> > hot power wire and the other secondary connection, I will get 220 to 250
> > volts(assuming I get the phasing right).  Then I connect this to a variac
>to
> > control the voltage.
> >
> > Has anyone tried these ideas before?
> >
> > thanks,
> >
> > Shaun Epp
> >
> >
> >