Where does one find Richard hulls magnifier papers?
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------ Original message------From: Tedd Dillard Date: Sun, Aug 12, 2018 11:34 AMTo: Tesla Coil Mailing List;Cc: Subject:Re: [TCML] Back again....and Tesla Magnifier Tuning
Gentlemen, (are there any female coilers?)I have not joined in on this thread as I have little to add to thediscussion.But I am glad to have followed it and do agree with Teslalabor on the lastpost.I realize that there are many coilers out there that actually move theknowledge base forward but that most are only really interested in bigsparks.My interest in magnifiers was based on the initial understanding that youcould get bigger sparks with a magnifyer and that it seemed that it waspossible by just adding a third coil to an otherwise two coil device.From this thread and from what I have read elsewhere especially RichardHull's papers I would say that while it is possible to get bigger sparks itis much more difficult to actually do so.The value here is that I will now focus on building the two coil machinethat seems more likely to perform well and be much easier to build and tune.I thank you all for the lessons.TeddyOn Thu, Aug 9, 2018 at 2:19 PM, Teslalabor wrote:> And that is, i still think, the one and only benefit of a Magnifier System> - in separating the driver equipment from the tertiary coil, which produces> the sparks. I can't see any reasons, why a 3-coil system should produce> longer sparks, than an equivalent 2 coil setup - and thats the goal we all> go for - doesn't it? ;-)>>> Am 09.08.2018 um 14:34 schrieb Greg Peters:>>> Thanks for all your advice Antonio.>>>> In that case I think I will stick with conventional 2 coil systems.>>>> Although the idea of leaving the cumbersome driver set up in the garage>> permanently and just being able to erect the extra coil outside quickly>> when needed is tempting... Much easier than moving a big two coil system!>>>> On Thu., 9 Aug. 2018, 1:17 am Antonio Queiroz, >> wrote:>>>> Em 07/08/2018 06:20, Gregory Peters escreveu:>>>>>> Thanks Antonio,>>> I've been reading your papers and it's quite an interesting concept.>>> Having to match the parts so carefully certainly would be a challenge>>> and does put me off the project a bit. In the unoptimised version,>>> does the tighter primary:secondary coupling offer any performance>>> increase over a regular two coil system? My simulations don't suggest>>> it does, but it seems it should given that magnifiers are routinely>>> run with K > 0.5.>>> I have a few other questions I may contact you off-list about.>>> Many thanks!>>> Greg.>>>>>> The tighter coupling is just a consequence of the small part of the>>> secondary-tertiary system that is coupled to the primary. From one of>>> the>>> formulas in http://www.coe.ufrj.br/~acmq/tesla/magnifier.html, if the>>> secondary coil of the conventional Tesla coil>>> is split in two coils with inductances L2 and L3, and k123 and k12 are>>> the>>> coupling coefficients for the conventional coil and for the magnifier>>> driver respectively, the system has the same behavior if k123 =>>> k12(L2/(L2+L3))^(1/2). For example, if the original secondary coil>>> inductance>>> is split in a 8:1 ratio, k12=3*k123. Of course this assumes negligible>>> capacitance across L2.>>>>>> Antonio Carlos M. de Queiroz>>> _______________________________________________>>> Tesla mailing list>>> Tesla@xxxxxxxxxxxxxxxxxx>>> https://www.pupman.com/mailman/listinfo/tesla>>>>>> _______________________________________________>> Tesla mailing list>> Tesla@xxxxxxxxxxxxxxxxxx>> https://www.pupman.com/mailman/listinfo/tesla>>>>> _______________________________________________> Tesla mailing list> Tesla@xxxxxxxxxxxxxxxxxx> https://www.pupman.com/mailman/listinfo/tesla>_______________________________________________Tesla mailing listTesla@tedward.pupman.comhttps://www.pupman.com/mailman/listinfo/tesla
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