Re: How To Measure NST Coupling

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>

Hallo Barton,

Friday, February 24, 2006, 11:50:33 AM, you wrote:

> Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
> Hi All,
> Anyone know a simple method of measuring the coupling of an NST?
> I tried throwing 120 Vac to the sec measuring input current

i don`t like any method that is based on current msms, coz i`m just too
lazy to take into account windings resistances, so i use my own one:

1. apply full rated voltage to primary, compute - x1=Usec/Upri
2. apply full rated voltage to secondary, compute - x2=Upri/Usec
3. compute copling at full rated voltage - k=sqrt(x1*x2)

p.s.
transformation ratio - Ktr=x1/k

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