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*To*: tesla-at-pupman-dot-com*Subject*: Re: From primary to top terminal*From*: "Malcolm Watts" <malcolm.watts-at-wnp.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)*Date*: Thu, 01 Jun 2000 21:00:51 -0600*Approved*: twftesla-at-uswest-dot-net*Delivered-To*: fixup-tesla-at-pupman-dot-com-at-fixme

Hi Finn, > Original Poster: "Finn Hammer" <f-hammer-at-post5.tele.dk> > > Hi guys! > > This post contains my background thinking, and ends with a question, and > an excuse! > > Now that my brother has got an interest in making the etesla5x run > faster, we talk about how a TC actually works. I`m not at much help, > since my understanding is flaky, but he keeps saying things like: of > course the secondary is a transmissionline, and: of course there is > going to be some turns ratio relationships btwn. primary and secondary > voltages. He used to work with radar and the like in his youth. > > My argument against the turns ratio relationship has been that of energy > conservation: the secondary cannot build up a greater voltage than that > allowed by the available energy, and the capacity of the top terminal. > (minus some part that gets stuck, charging the self-c, med-c or > intrinsic-c or whatever(over my head)). > > On the way to the gastank, for cigarettes, this thought struck me: If I > was going to charge a cap to some voltage, with an ordinary transformer, > I would probably not want to use a 20 kV transformer to reach a voltage > of, say, 4 kV would I?. It seems as It would be more appropriate to use > a 4 kV transformer for that job. > > So the question that I arrived at is this: > > Will a Teslacoil benefit from being built so that the voltage attainable > by the rule of turns ratio btwn. primary and secondary matches the > voltage that can be attained by the rule of conservation of energy? If you plug your typical inductances into Wheeler's formula and further assume that the secondary operates as a lumped circuit, you'll quickly find that for typical primary and secondary h/d's, the turns ratio is actually the best you can do for a fixed lump of energy. SQRT(Ls/Lp) doesn't do as well. You can see that if Hs = Hp and Ds = Dp (i.e. k=1), that ratio reduces to the clssic transformer turns ratio. On the other hand it is claimed by proponents of wave action on a slow wave structure that you can do far better than Ns/Np. I haven't yet seen much evidence to convince me of that in a non-CW regime but maybe you can although I think COE still applies to a lump of capacitance fitted to the top of a resonator which is appreciably less than a wavelength long at Fr. Regards, Malcolm

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