Re: Several questions about transformer

• To: tesla-at-pupman-dot-com
• Subject: Re: Several questions about transformer
• From: "Jim Lux" <jimlux-at-jpl.nasa.gov> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Tue, 14 Mar 2000 17:43:11 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Tuesday, March 14, 2000 12:06 PM
Subject: Several questions about transformer


>Original Poster: "Kamil Kompa" <czlonek-at-polbox-dot-com>
>
>Hi!
>
>1. What is the best material to make isolation between layers in
>   secondary coil ?
Mylar film is popular, as is Teflon. Kraft paper will work too, for an oil
filled unit.

>
>2. What should be the wire diameter to make 150 mA secondary ?

A typical guideline would be a minimum cross sectional area of 500 cmil/Amp,
so you'd need 75 circular mils.  (AWG 31 is 79 circ mil, .0097 inch diam)
1000 cmil/Amp is quite conservative, for which you'd need 150 cmil.  This is
AWG28 (158.8 cmil, .0136 inch nom diam (with insulation))
>
>3. What is "mil"? I found that foil thickness is measured in this
>   individuals of measure. (What is dependence : mil to millimetre ?)

mil = 0.001 inch = 0.0254 mm

40 mils = 1 mm approx...

>

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