Re: Any Very High Freq. TCs?

To: tesla-at-pupman-dot-com
Subject: Re: Any Very High Freq. TCs?
From: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Thu, 03 Sep 1998 19:25:09 -0600
Approved: terryf-at-verinet-dot-com

to: Malcolm

David Sloan overcame all of these obstacles while producing a 150 kva Tesla
coil driven at 15 kV -- output was 1 MEV at 100 kva -- and, as you
suspected, was in a coaxial tank.  Primary was a tapped portion of the sec
winding with only 18 total turns on the sec coil to produce 1,000,000
volts.  He was very clever in his total design.  The article is among those
I posted earlier this year in the recommended reading book list for Tesla
enthusiasts.  It was in a published technical paper from Stanford.

DR.RESONANCE-at-next-wave-dot-net

----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Any Very High Freq. TCs? 
> Date: Thursday, September 03, 1998 6:26 AM
> 
> Original Poster: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz> 
> 
> Hi Steven,
> 
> > Original Poster: Steven Ivy <adder_black_the-at-yahoo-dot-com> 
> > 
> > I have been looking for a while and I have yet to see any real mention
> > of the significance of the overall operating frequency of a TC other
> > than it is best to have the primary and secondary resonances tuned to
> > the same frequency. I was just wondering if the standard TC topology
> > is still useful at very high frequencys like at 1 Mhz or even much
> > higher?  In principal I don't see any reason why the whole concept
> > should not scale  nicely and produce a perfectly good high performance
> > design that would only need to be a small  fraction of the size of the
> > ones we usually see. It would be a lot of fun to have half a million
> > volts at 1 GHz operating on my kitchen table : ) Is there some
> > particular flaw in this scaling idea other than the difficulty in
> > producing a spark gap capable of operating at these very high
> > frequencys.
> 
> Conventional TC technology:
> There is a problem assuming one wants a physically small machine : 
> how do you prevent 1/2MV from arcing over a secondary a few inches 
> long?
>      There is a second problem: to get any real energy into the 
> primary, the cap value would have to be such that the primary 
> inductance was vanishingly small.
> 
>     You could do something with waveguides but I'm not sure how you'd 
> handle 1/2MV.  However, there may be ways around these obstacles I've 
> not thought of. Be interested to hear what others have to say.
> 
> Malcolm
>