RE: audio modulated SSTC

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

Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com> 

Hi, well I have it minimally documented on my web site:
www.chaoticuniverse-dot-com
But, believe me it is not a simple task. I have done ok, but many trying
to replicate my results have had some real issues. Certainly audio mod
is easy, but good audio is the trick. Please let me know if you want
further detail, I will contact you off list.

Regards,

David Trimmell

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, February 04, 2004 4:19 PM
To: tesla-at-pupman-dot-com
Subject: RE: audio modulated SSTC

Original poster: "Ian McLean" <ianmm-at-optusnet-dot-com.au>

Hi David,

I sure would be interested in seeing some details of your audio
modulated
VTTC.  I am interested in pursuing this more than the SSTC route - don't
like the thought of blowing up all those FET's/IGBT's ;)

Rgs
Ian

  > -----Original Message-----
  > From: Tesla list [mailto:tesla-at-pupman-dot-com]
  > Sent: Thursday, 5 February 2004 10:05 am
  > To: tesla-at-pupman-dot-com
  > Subject: RE: audio modulated SSTC
  >
  >
  > Original poster: humanb-at-chaoticuniverse-dot-com
  >
  > I think AM mod of the rail would be the way to go for
  > real HiFi SSTC. Truly, the gate modulation is going to
  > get ok audio, but not quite HiFi. But the results are
  > realy quite impresive, and Jim, you shouldn't shoot it
  > down without at least trying it. I only wish I could
  > get more plasma to modulate! I know from My VTTC work
  > that a hotter and larger plasma discharge will give you
  > a deeper more full sounding audio. As it is I am quite
  > happy with the results, but the better tone control you
  > have over the audio source the better. A in-line
  > equalizer would be ideal, but I am happy with my
  > previously mentioned pre-amp with base and treble
  > control, works well enough. Sure the heck beats trying
  > to fight with my audio modulated VTTC everytime I
  > wanted to play with it!
  >
  > Regards,
  >
  > David Trimmell
  >
  > On Wed, 04 Feb 2004 08:18:51 -0700, "Tesla list" wrote:
  >
  >  >
  >  > Original poster: "Mccauley, Daniel H"
  >  > <daniel.h.mccauley-at-lmco-dot-com>
  >  >
  >  >
  >  > I wouldn't go so far and say something like that.
  > SSTC
  >  > audio modulation
  >  > is a very worthwhile and rewarding experiment.
  >  > Performance can actually be very impressive and
  > quality
  >  > is quite high
  >  > despite the fact audio is coming from a high
  >  > voltage plasma.  For anyone who've heard my stereo
  > SSTC
  >  > PlasmaSonic
  >  > coils in action can attest to that.
  >  >
  >  > I've also done some additional work early this winter
  >  > with the use of
  >  > parametric equalizers to further refine the audio and
  >  > ultimately the
  >  > quality of the playback with a SSTC coil.
  >  >
  >  > So in summary, audio modulating an SSTC coil is
  >  > DEFINITELY worth it.
  >  >
  >  > Dan
  >  >
  >  >
  >  > Well I for one would say audio modulating an SSTC
  > isn't
  >  > worth it since
  >  > you only get mediocre sound quality.  Tube driven
  >  > tweeters run in the
  >  > 10s of megahertz range.  Having built a tube driven
  >  > plasma tweeter, I
  >  > can tell you that the coil that actually steps the
  >  > voltage up is only 15
  >  > turns of 16awg solid wire, so it's resonant frequency
  >  > will be very high.
  >  > Yes they do use grid modulation, but the tube is
  >  > already running at
  >  > around 30mhz to generate the plasma flame, then you
  >  > just modulate the
  >  > signal to the coil.  I wonder if there is such a thing
  >  > that you could
  >  > use to build a self resonant audio modulated sstc by
  >  > feeding the output
  >  > of the comparator to another chip which would also
  > take
  >  > the audio input.
  >  > That way, it could amplitute modulate the input signal
  >  > from the
  >  > comparator, which I think would allow audio
  > modulation,
  >  >  is there such a
  >  > thing?  I think he was getting his info from dan's
  > site,
  >  > www.spacecatlighting-dot-com...
  >  >
  >  > Regards - Jim Mitchell
  >
  >