Re: [TCML] VA formula

["Dan Casaregola" <ag2z@xxxxxxxxxxx>]

David,
Thank you for responding.  I'm sure I could use your calculated value sheet 
to insure that my math is correct.  Much appreciated.   Dan in Calif.
----- Original Message ----- 
From: "David Speck" <Dave@xxxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Wednesday, December 01, 2010 5:38 PM
Subject: Re: [TCML] VA formula


> Dan,
>
> A reasonable approximation for common laminated silicon steel cores is 
> obtained from the following formulas:
>
> Core cross section area (sq in) = 0.16*(SQRT(VA))
>
> or
>
> VA Rating = ((Core Cross section area (sq in))/0.16)2
>
> I have a .PDF spreadsheet with a number of typical values precalculated 
> that I can send you if you want.
>
> Lemmee know.
>
> Dave
>
> On 12/1/2010 6:26 PM, Dan Casaregola wrote:
> > I have a MMot,(read Monster Microwave Transformer) which I want to 
> > estimate the VA rating of, and I lost my notes re volt-ampere calculation 
> > using the core area squared.  This beast weighs 25 pounds, and is very 
> > well constructed.  No welds, all 1/4 20 hardware, and 1/8 inch steel 
> > mounting brackets.  Ideal for re-winding for heavy duty inductor or high 
> > current low voltage supply.  Would appreciate the formula.  Thank you. 
> > Dan
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