RE: SSTC - experiments

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

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

Ah, but it works for ANY input.  All of the SSTCs on my site are 
self-resonant, including the twins.  The only one that isnt self-resonant 
is of course the plasmasonic, but that doesnt really need to be.  And 
actually, if you look at what the self-resonant designs need to work, its 
not much more than a good comparator and sometimes a buffer (i like to use 
logic inverters) added into the system.  In my opinion its well worth it.

Steve


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: RE: SSTC - experiments
>Date: Sat, 10 Jan 2004 12:06:04 -0700
>
>Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com>
>
>
>Yes, but the current self-resonant design you are using doesn't work for
>half-rectified input.
>It only works for CW (DC input) mode.
>
>Dan
>
>
> > Ah, you see Dan, if you used a self-resonant design (just
> > kidding, it would
> > not be easy to make a feedback based audio SSTC) , then many
> > things are
> > possible, including the jaccob ladders ive built with my SSTCs.
> >
> > For some cool experiments see this:
> >
> > http://www.hot-streamer-dot-com/srward16/CapacitiveCoupling.htm
> >
> > also, other experiments in the SSTC index:
> >
> > http://www.hot-streamer-dot-com/srward16/SolidStateTeslaCoils.htm
> >
> > have fun!
> >
> > Steve Ward
> > >
> > >Shaun,
> > >
> > >I don't believe your Jacob's Ladder is going to work when driven by a
> > >SSTC. There are a few issues:
> > >
> > >1.  Tuning - The length of the rods used in a tesla coil acts as an
> > >additional capacitance to the topload
> > >of your coil.  If the arc broke out at the bottom, the wire
> > capacitance
> > >(stray to ground) may be less than 1pF.
> > >As it starts rising, this capacitance will increase.  And
> > initially when
> > >you turn the unit on, you will have the
> > >entire length of the rod to contend with.  Therefore, the SSTC may be
> > >tuned for a particular frequency, but depending on
> > >where the arc is with respect to the rod, the resonant
> > frequency of your
> > >resonator may change drastically.  As a comparison
> > >I use different sized rods (electrodes) on my PlasmaSonic
> > coils to vary
> > >the frequency.  A 4" rod vs. 16" rod may be as much
> > >as 5pF difference.  (See my PlasmaSonic Presentations for
> > more details
> > >on exact numbers)
> > >
> > >2.  Break-out.  The voltage is very high on an SSTC
> > (compared with NSTs,
> > >etc...)  You'll need to have some serious
> > >corona balls and corona protection in your circuit to
> > prevent arcs from
> > >breaking out on the top of the rods or elsewhere.
> > >
> > >Dan
> > >
> > >
> > >
> > > > Ok, so I have this SSTC working, 14 inch sparks straight
> > up from the
> > > > breakout point.  I'm going to try for longer sparks and
> > > > different type of
> > > > input power.  So far I've tried half wave rectified and full
> > > > wave rectified
> > > > power - 140vac from a variac.  I put a CD on a metal
> > stand onto of the
> > > > toroid and it started on fire and melted - Oops...... another
> > > > AOL cd bit
> > > > the dust, at least their good for something.  I want to make
> > > > a big jaccobs
> > > > ladder with it and maybe an ion motor.  What other
> > > > experiments have people
> > > > done with there SSTC.
> > > >
> > > > These things are really cool!
> > > >
> > > >
> > > > Shaun Epp
> > > >
> > > >
> > > >
> >
> >