Re: SSTC - experiments

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

Original poster: dhmccauley-at-spacecatlighting-dot-com 

I'm corrected then.  From reading Justin's website, he did state he was
having trouble with the self-resonant system when using half-rectified or
similar input as opposed to
CW (DC input).

Dan


 > 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
 > > > > >
 > > > > >
 > > > > >
 > > >
 > > >
 >
 >
 >
 >
 >