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*To*: tesla-at-pupman-dot-com*Subject*: Re: Maggie help needed*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Sun, 04 Feb 2001 15:04:27 -0700*Resent-Date*: Sun, 4 Feb 2001 15:12:02 -0700*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <npNf4.A.eKB.vOdf6-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-uswest-dot-net>" <acmq-at-compuland-dot-com.br> Tesla list wrote: > > Original poster: "michael.tucknott by way of Terry Fritz <twftesla-at-uswest-dot-net>" <michael.tucknott-at-virgin-dot-net> > > Hi Antonio > It was late and thats all I`m gona say, glad you spotted my mistake the > primary and secondary > numbers should indeed be swop around. > As for the for dimenshions:-primary is H = 9" by D = 13 3/4" > Secondary H = 9 3/4" by D 9 1/4" Ok. So, trying the coils in the acmi program, I get: L1=79.3 uH L2=0.775 mH L3=10.7 mH k12=0.497 The coupling coefficient is too high for the values of L2 and L3. The coupling coefficient should be sqrt(L2/(L2+L3))=0.26, or L2 should be higher, 3.5 mH. With this L2 you need rather high capacitances at the top of L2. Assuming that you can change k12 by rising L2 above L1, or modifying L1, the closest modes that I found were (I assumed C3=20 pF. Only the ratio C2/C3 is important): 7,8,11: L2=0.772 mH, C2=192 pF, k12=0.259 10,11,20: L2=0.784 mH, C2=100 pF, k12=0.261 11,12,13: L2=0.740 mH, C2=93.7 pF, k12=0.254 For L1=80 uH, and assuming C3 as really 20 pF, The primary capacitance should be only 2.9 nF, to satisfy the relation L1*C1=(L2+L3)*C3 A table with values up to mode 15,18,29 is at: http://www.coe.ufrj.br/~acmq/magt.txt Regards, Antonio Carlos M. de Queiroz

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