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Re: ISSTC Components

Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz> 

On 14 Jun 2004, at 9:26, Tesla list wrote:

 > Original poster: "Dan" <pbursa-at-cfl.rr-dot-com>
 > I think the real break trough is that Jimmy and Steve started using
 > resonating primary ... That's what makes DRSSTC and ISSTC different
 > from SSTC running in the interrupted mode. Vladan

You must have missed a previous post from me on the subject. I did
exactly that 8 years ago. Although the setup was done for purely
experimental reasons and was small, the idea of using SS devices as a
gap substitute in an otherwise standard coil is not new. What is new
is a class of switching device not available back then. I even
contemplated using Westcode thyristors and flywheel diodes rated in
the kA range but on running the figures, found that the di/dt rating
of the thyristors would only permit a full powered coil to fly at
around 10kHz. Again, all this is history and on record in the list


 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Monday, June 14, 2004 1:19 AM
 > Subject: Re: ISSTC Components
 >  > Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
 >  >
 >  > On 13 Jun 2004, at 12:00, Tesla list wrote:
 >  >
 >  > <snip>
 >  >  > I do appreciate what you are doing, but i cant help from voicing
 >  my >  > opinion about this.  It would be different if you had bought
 >  these >  > parts at discount and resold them, but you are selling
 >  samples.  As >  > the "inventor" of the ISSTC, i guess this makes me
 >  feel a bit more >  > emotional about this related issue. >  > >  >
 >  Regards, >  > >  > Steve Ward > > That's a pretty bold claim
 >  considering that Mark Barton ran his > MOSFET coil in both CW and
 >  interrupted mode years ago. I once thought > that a Marx bank I
 >  developed was an innovation since I used chokes > instead of
 >  resistors as the charging elements. Then a kind person in > the
 >  States gave me a copy of Sargent and Dollinger's "High Power >
 >  Electronics" and I saw "my" wonderfully innovative scheme described >
 >  in graphic detail and written up long before I hit upon the idea. >
 >  That's not to belittle your achievement in any way but just to make >
 >  known that an exhaustive search for prior art is not a bad thing >
 >  before making claims of originality. > > Malcolm > >