Re: Super Small SSTC (fwd)

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

Original poster: Tesla List Moderator <mod1-at-poodle.pupman-dot-com>



---------- Forwarded message ----------
Date: Sat, 17 Jul 2004 10:38:51 -0400
From: Jim Mitchell <Electrontube-at-sbcglobal-dot-net>
To: Tesla list <tesla-at-pupman-dot-com>
Subject: Re: Super Small SSTC

This is actually an "SSTC" circuit which is driving the secondary.  There is
an internal primary and an antenna, which picks up the radiation from the
secondary and feeds it back into the gate drive chip,  which then drives the
mosfet, which in turn switches the primary on and off at the resonant
frequency of the secondary.

I think we could all confirm that the definition of a tesla coil is an AIR
cored resonant transformer which makes a high voltage, and preferebly corona
discharge.   What's the point of just an oscillating air cored coil if it
makes no high voltgae or corona discharge?

Regards - Jim Mitchell
----- Original Message ----- 
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, July 16, 2004 9:12 PM
Subject: Re: Super Small SSTC


> Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
>
>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Friday, July 16, 2004 6:58 AM
> Subject: Re: Super Small SSTC
>
>
>  > Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net>
>  >
>  > Here's some photos of my EXTREMELY small SSTC.  It is overall .78" by
2"
> and
>  > runs at 8.5MHz off a 13v supply to make 3/8" arcs.
>  > http://www.hot-streamer-dot-com/electrontube/tintc
>  >
>  > Regards - Jim
>
> Hmmm, this is looking conceptually an awful lot like a RF power source
> driving a resonant circuit.  If I take my 100W HF transceiver and drive a
> resonant LC at 14 or even 30 MHz and it flashes over, is that a TC?  A Q
of
> 3-5 should be enough to get above the minimum sparking potential.
>
> I've got some pretty pictures at work of the RF filters in the Mars Rover
> with a nice discharge being driven at 10-15Watts. (before they were
> redesigned, that is) (mind you, this is at an equivalent earth altitude of
> 100,000 ft, too).
>
> I think in the "race to the smallest"  there should be some informal
rules..
> At what point is it just a power oscillator that is poorly insulated
instead
> of a TC.  For a spark gap coil, there's not a problem, but when you get to
> power amplifiers driving a resonant circuit...  Along the same lines.. Is
a
> flyback with a needle point shooting corona a tesla coil?
>
> I have to say, though, that Jim Mitchell's little coil is pretty nifty.
>
>
>