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1、ExcerptfromPopularMechanics1968ElectricalfantasieswithaTeslacoilByHAROLDP.STRANDITJUSTSITStherespittingfire,likeafugitivefromamadscientist'slaboratory.Thecurrentit'sdischarging-inawicked,noisy2-in.brushisofsuchahighfrequencyyoucan'tmeasureit,butmaybeitrunsupto40,000volts!Feeling
2、justabitsuicidal,youmoveacointowardthisgeyseroffire.Thegreedytentaclessnatchtowardit,butthere'snoshock.Evenifyoupokedafingerintothebrush,thecurrentwouldjustsplashoveryourskin.EversinceNikolaTeslainventedahigh-voltage,highfrequencycoil,scienceexperimentershavebeenintriguedwiththe
3、irownvariationsonhiscoil.InTesla'stime,high-frequencycurrentwasobtainedwithaninductioncoilasaprimarysourceofpower.Leydenjarsservedascapacitors,withasparkgapandtheinductanceofasecondcoilcombiningtoformanoscillatorydischargeofhighfrequency.Withtoday'svacuumtubesandmicacapacitors,w
4、ecanmakeamuchmoreefficientandsafercoil.TeslacoilSpectacularfireworksincludearingoffirescribedbyawirepivotingonaphonographneedleattachedtoaterminal.Afinerwire,attacheddirectlytoacoil,producestrumpetpinwheels,showninthesmallerphoto.ThisarticletellshowyoucancreatethesefireworksMATE
5、RIALSLIST1811-Atube1Ceramic4-pinsocketwithovalmountingflange19/16ceramicplatecap12500or3000ohm,25wattOhmitepowerrheostatwithknob13000ohm,20or25wattfixedresistor16.3v.6amp.filamenttransformer.Thordarson21F11orequivalent.11000v.,150ma.platetransformer.Withenlargedenclosure,standan
6、dStancorPC8414powertransformer(1200v.,200ma.),canbesubstituted,usingprimaryandthesetapsonly2S.P.S.T.bathandletoggleswitcheswithsolderlugs,6amp.125v.1Fingerknobpaneltypefusemountfor3AGfuses1Box(5)3AGfuses,slow-blowtype,2-4amp.15-waybindingpost1Linecordwithplugattached1Johnson135-
7、45insulator.Usetophalfonlywith2½”8-32machinescrew1Micatransmittingcapacitor.0005mfd.3000v.TypeCM652Micacapacitors.004mfd.2500v.TypeCM60.Note:Valuescanbefrom.0002to.001mfd.fortheCM65and.002to.005forthetwoCM60s1Cinch-JonesbarrierterminalstripType5-1401Cinch-Jonesbarrierterminalstr
8、ipType2-140About1/4lb.#32FormvarmagnetwireAbout
