RE: Mutual Inductance & K Factor

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Bart -

For rough measurements I recommend the Wavetex (27XT?) or similar meter.
This meter measures capacitance, inductance, and frequency in addition to
the usual DMM ranges. It will do all the necessary metering for the mutual
inductance (Lm) and the K Factor (K).

I downloaded the Nolan data from your program. This download ability is a
nice feature of your program. In the Java outputs I note that the Pri/Sec
clearance is one inch instead of the 1.4 inch that I understand is what
Nolan said. This means the Java K is even lower than previously shown. I
believe this Java K is too low for the geometry of this coil while the
JHCTES K may be too high. Only testing the coil can solve the problem.

With Java primary inner diameter = 5.18 the Pri/Sec clearance is 1.4 inches.
The new outputs are:

   Sec above Pri = 0 inches
                 Java         JHCTES
       Lm       13.53         25.52
       K        .1023         .193

Sec above Pri = 3 inches
                 Java          JHCTES
       Lm         2.79         10.84
       K         .0211         .082

John Couture

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-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, March 17, 2002 6:50 PM
To: tesla-at-pupman-dot-com
Subject: Re: Mutual Inductance & K Factor


Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

John -

Tesla list wrote:
>
> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> <couturejh-at-mgte-dot-com>
>
> One thing that would help is for coilers to agree on the kind of tests to
be
> made. This would help to solve some of the many unknowns of the classical
> Tesla coil including the optimum coupling.


True. But we can't have coilers go out and buy scopes simply to gather data.
Most coilers have at least a multimeter with volt and amp capability making
this type of test acheivable.

I use 2 meters side by side for concentric readings. All that is needed from
that point are accurate measurements of the coils.

----------------- snip


Take care,
Bart