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 some reason I keep messing up the specs on this coil. Anyhow it will be
interesting to find out what the tests show.

I do not understand how you arrived at the 65.3 for the top terminal
reduction. This parameter appears to affect some outputs including the
resonant frequency but not the mutual inductance or the K Factor.

John Couture

---------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, March 19, 2002 8:31 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>

Hi John,

Tesla list wrote:

>
> 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).




Funny you should mention that. I have the 27XT. Use it all the time these
days.
It's capacitance ability is lacking, but everything else is tops! Between my
Fluke, Wavetek, and Metex (which is excellent in the Frequency arena if
nothing
else), I'm set up pretty well in this type of minor equipment.

>
> 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.




No, it's 1 inch. Here are Nolan's original specs (see primary):

Secondary:  2.375 in diameter by 15in high wound with Awg 28 12.75 in long
  10 or more coats of polyurethane
  Primary: 6awg ground wire 0.25in spaced between turns max turn 8.75 1in
  spaced from secondary
  Topload: Toroid length is 9.5in and 3.375 cord, made from flexible Al
tubing
  wrapped 3 times in Al tape
  Cap: Maxwell pulse discharge 0.03uf rated at 35kv
  Spark gap:  single static gap .25in carriage bolts set at 0.15in just
below
  transformers max spark length
  Power Supply: Franceformer 7500kv at 60ma


John, the your numbers below won't apply as it's based on an incorrect
parameter. I do agree that only testing verifies prediction, but to that
degree, the measurement technique and accuracy must be looked at carefully.
There are times when the error in measurement exceeds a programs error (both
electrically and physically).

Take care,
Bart

>