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*To*: tesla-at-pupman-dot-com*Subject*: Re: Tesla Coil Blunderbusses/another viewpoint*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Wed, 11 Apr 2001 08:00:26 -0600*Resent-Date*: Wed, 11 Apr 2001 08:42:26 -0600*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <_gK5VD.A.Y5F.O1G16-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "harvey norris by way of Terry Fritz <twftesla-at-uswest-dot-net>" <harvich-at-yahoo-dot-com> --- Tesla list <tesla-at-pupman-dot-com> wrote: > Original poster: "Malcolm Watts by way of Terry > Fritz <twftesla-at-uswest-dot-net>" > <m.j.watts-at-massey.ac.nz> > > Just following on from my last post: > > Actually, there is an energy thing buried in here: > if the gap does > quench early, it leaves more energy available for > output sparks > rather than the gap wasting it on each successive > transfer. > Also, this mechanism, if correct, is probably in > use in dozens of > systems already. It seems to be common practice to > run the primary at > a lower frequency than the secondary. Many have > attributed this to > tuning for streamer loading but I am becoming > increasingly suspicious > of this idea. Reason: discharges in a system with a > large ROC topload > don't actually issue until the secondary has fully > or nearly fully > rung up which leaves the primary out of the picture > during the > initial discharge at least. It might also assist gap > quench in > systems which until now have attributed earlier > quench to superior > construction techniques and complex gap > configurations. I wonder. > > Just thought I'd round things out. The ideas remain > to be proven or > shown to be utter rot. > > Malcolm Concerning the issue of quenching problems inherent in a tesla primary I suggest the following. Given a spiral primary shown as X's, construct two of these in layers. (Outer connection-exit inner) 0------------------XXXXXXXXXXXXXXX---I-/res cap/------0 I *----arc gap --------* I 0---/res cap/---I--XXXXXXXXXXXXXXX--------------------0 (outer connection-exit inner) Note; the above scenario is a double negative where 180 phased currents themselves using a spiral pathway in opposite directions of travel do produce the fields in unison, contributing to the mutual inductance to arrive at a near 4 fold increase of inductance than a single primary will supply. The drawing is made only to show this idea, where for practical considerations oppositely wound direction primaries would be used so that the same inner and outer connections on both primaries would be employed. In that case the best option would be to introduce the currents on both interior spirals and have the arc gap connections made on the outside endings of the coils. Now recalculate the capacity needed for a 4 fold increase of the primary inductance, provided the spacing between layers is equivalent to the spacing between winds. Or simply measure this ~4 fold increase and compute the capacity needed to resonate based on the increase of series primary inductances. Once this value is determined it must be doubled, and that is the quantity used on each side. This because when the arc between primaries occurs the desired capacity for resonance will now be twice as small as the single value used on each side, as the arc schematically places the caps in series, resulting in the effective capacity to be half that with two of those values in series. Now the primary arcing has the resistance of the primaries themselves in series with the arc, which makes quenching an easier issue. In fact I have used this same approach with very large inductors at 60 hertz resonance to produce arcs that instantaneously quench themselves, and produce high frequency signatures of the magnetic fields of the coils used. I have named this approach a Binary Resonant System, (BRS) Unfortunately I have not yet tried this scheme with two tesla primaries, but it would seem to me to be possible. Sincerely Harvey D Norris ===== Binary Resonant System http://members3.boardhost-dot-com/teslafy/ __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo-dot-com/

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