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*To*: tesla-at-pupman-dot-com*Subject*: I'm wondering about this gap and tuning issues. Am I finally *beginning* to understand?*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Wed, 11 Apr 2001 19:22:54 -0600*Resent-Date*: Wed, 11 Apr 2001 19:22:22 -0600*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <8OeWWD.A.YuG.LNQ16-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "Garry Freemyer by way of Terry Fritz <twftesla-at-uswest-dot-net>" <garry-at-ndfc-dot-com> I've been reading here quite a bit, and a lot of what is written here is WAY over my head. The hardest part I think is getting the terms straight. Usually, by the time my mind finally coughs up the definition of a term I am reading, I've forgotten what was said about it. Then by the time I am done reading it again, I've forgotten the definition and by the time I recall the definition, I've forgotten what was said again. ;-) So, I try to visualize it in my head and I was thinking about NST's. I seem to remember that (Reason I say this is because I don't trust my memory any farther than I can throw a fully loaded and operating washing machine) that when you have alternating current that the voltage is like a sign wave, going positive, then neutral at the point of reversal, and then negative. There are peaks and valleys in the sine wave. I will rever to them both as peaks. So, I was thinking about how could a cap in a tesla circuit be charged when the current is going negative and positive. I asked myself why it wasn't canceling it all out and here is what I came up with. Someone tell me if I am close? Are these statments true or close? The primary and the gap spacing in a tuned tesla coil is such that the gap fires as near the PEAK voltage (Or is this current?) so as to discharge the cap. The close to the peak the gap fires the better. When the charge is reversed, the gap fires on the reverse peak. If the gap fires early, output is reduced because the charge is drained before it can maximize, and if it fires too late, output is reduced because some of the charge has been canceled out by the opposite charge that is now flowing into the capacitor. True? The primary, acts as a kind of resistance to emf flow, halting it at the right time (Quenching) and delaying the discharge to the right moment. True? So, that's where we get the 120 breaks per minute because the gap fires on the peaks that are double the alternating cycle of 60 cycles per second. True? Than a BPS of 60 would mean the gap discharges on the peaks of only the upper or lower half of the sine wave or every other peak? So, rotary gaps have the advantage of better control. AC would do best with a sync gap and DC would work with either sync or assync? I recall folks speaking about voltage ringup, would that be kind of like where the relationship between the frequency and the inductance in the NST is such that the current gives a shove to the next cycle kind of like a person rocking back and forth on a swingset to get more swing (Amplitude). Wow, this last one sounds a little far fetched to me. Take this one with grain of salt if desired. --- So, after reading all your posts out there, am I finally getting some idea of what ye all are saying or am I still in clueless canyon? PS: Warning! If you reply in really technical terms. I probably won't understand you. ;-)

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