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Re: Directions for tesla coil research

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 5/5/02 6:24:16 PM Eastern Daylight Time, tesla-at-pupman-dot-com

Malcolm, Paul, all,

An interesting test would be to increase the topload C, but
keep the ROC the same, or even reduce it, and see what
happens.  In all the tests I did, I increased the ROC along with
the increased topload C.  In these tests, I found a range of
toroid sizes which gave the same spark length.  At the low
side of the range, the sparks were thin and active.  At the
high edge of the C and ROC range, the sparks were thicker,
but seemed somehow "sluggish".


> > Jim's comments cut to the heart of the matter:  The question is,
> > what is the relative significance of topload voltage and topload
> > charge in determining streamer performance?
> Absolutely agree. It's been a hobby horse of mine for quite a while 
> now. For one of my coils, increasing Ctop by an effective 100% (Ctot 
> increased from about 26pF to 33pF or so) resulted in a 25% increase 
> in reach with the same primary energy and breakrate. However, 
> unloaded primary Q was also increased by 50% as a result of retuning 
> so the Ctop factor did not sit alone. Given half a chance (like a 
> suitable test room), I'd like to boost Ctop further and check for 
> further improvement. Maybe in the semester break in June.
> Regards,
> malcolm
> <snip - points noted>