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*To*: tesla-at-pupman-dot-com*Subject*: RE: SSTC does 10 foot sparks*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Thu, 24 Jun 2004 08:59:08 -0600*Resent-Date*: Thu, 24 Jun 2004 09:04:11 -0600*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <0Hjq7B.A.R7D.j1u2AB-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "Steve Conner" <steve.conner-at-optosci-dot-com> >I agree wholeheartedly. And me! The whole energy vs. power thing is just a red herring. You can convert between energy and power at will, by just integrating or differentiating with respect to time. You should get the same answer for efficiency of your coil no matter which method you use. Of course, by efficiency, I mean (power delivered to discharge/power drawn from wall socket). The relationship between power delivered to discharge, and length of discharge, is a different ballgame altogether, and we understand it a lot less. But I still think, from experimental evidence, that power is a better way of rating things. Freau's formula (spark length that you get about once a minute= 1.7* square root of power input) works remarkably well. It works because the spark length, though random, obeys statistical laws. So the big strike that you get once a minute is related in a predictable way to the controlled spark length that John Couture is so fond of. There is no comparable formula that works in terms of energy only. That is because the spark length achieved by a given energy depends on how fast the energy is delivered, i.e. the power. For instance, if I discharge a single 8 joule shot of energy into a pulsed SSTC over a half-hour period (a power of 4.4 milliwatts) I'll get no sparks at all. But if I do it in 60 microseconds (a power of 133 kilowatts) I get a deafening BANG! and a 24" streamer. Of course, if I set my coil to let off one of these 8 joule, 60 microsecond discharges every half hour, the average power consumed by the coil would still only be 4.4 milliwatts and yet it would be doing 24". This demonstrates why Freau's formula loses accuracy for BPS other than 120. Confused yet? :)))))) Steve C.

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