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*To*: tesla-at-pupman-dot-com*Subject*: RE: Formulas*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Thu, 15 Feb 2001 19:46:30 -0700*Resent-Date*: Thu, 15 Feb 2001 19:46:37 -0700*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <i9RQiB.A.VmB.GSJj6-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "David Dean by way of Terry Fritz <twftesla-at-uswest-dot-net>" <deano-at-corridor-dot-net> Hi Jason, I just put a lookup table with some wire sizes from a wire table and the following formula for max TPI =1/(J13*1.05) in the output cell, and the lookup function in cell J13 = VLOOKUP(F9,A242:B250,2) F9 is the input cell where you put the gauge of the wire you want to calculate for, and the lookup table has the following info in it. Wire size table Row Column A B 242 18 0.0437 243 20 0.0346 244 22 0.0276 245 24 0.0223 246 26 0.0178 247 28 0.0144 248 32 0.0095 249 36 0.006 250 40 0.0038 Of course you might want to have more sizes. These diameters are for heavy build magnet wire and come from WireTron. Any wire table will do, but be aware that the thickness of the insulation will vary from manufacturer to manufacturer a bit. later deano > -----Original Message----- > From: Tesla list [mailto:tesla-at-pupman-dot-com] > Sent: Thursday, February 15, 2001 12:36 PM > To: tesla-at-pupman-dot-com > Subject: Formulas > > > Original poster: "Jason Johnson by way of Terry Fritz > <twftesla-at-uswest-dot-net>" <hvjjohnson13-at-hotmail-dot-com> > > Does anyone have a formula for calculating the AWG size of a wire from the > diameter (preferably in inches), and/or a formula for the number > of turns per > inch based upon the AWG? I need these formulas for an excel > spreadsheet so the > simpler they are the easier it is for me to put them in. They need to have > fairly good accuracy (+/- 1% or less). Also I haven't really > looked around for > them yet, but if anyone has any formulas for inverse conical > (saucer shaped) > primaries I could use those too. > > Jason Johnson > > >

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