Re: [TCML] Flat strip primary inductance

[Ed Phillips <evp@xxxxxxxxxxx>]

Kurt:

   I agree with you about the work involved and took it as a challenge 
to see what I could get to work.  Main interest was in mutual inductance 
calculations [variometers and Tesla coils] because Wheeler's approximate 
inductance formulae are always "good enough for government work".  I 
also used stuff from Grover's book.  Had to teach myself something about 
interpolating in "two dimensions" but finally got programs that worked 
fine and included wire tables and approximation for high-frequency 
effects.  Was it worth the effort?  Probably not.  Was it fun?  Yes, 
particularly when I decided I was finished.

   When I get a chance I'll download your files and see how you did 
things.  Thanks for the links.

Ed

"Ed Phillips wrote:
<snip>

>    How much of C 74 have you put in Excel?  I'd be interested in
> copies of anything you'd care to share.  About 30 years ago [almost
> exactly, that's when I got my first TRS-80] I started doing that in
> Basic but never got beyond programs for inductance and mutual
> inductance.
> Ed


Ed,

I just did the transfer for the flat strip inductance. As you probably 
have experienced yourself, when transforming it to Basic, the job is 
accompanied by labourous transferring & fitting the tables needed, to 
computer-usable forms. So I was lazy to convert more of the valuable 
stuff to programs.

The relevant parts of NBS Circular 74 of 1918,
are Pages 250 to 262 + 285. They can be had at:

http://deanostoybox.com/hot-streamer/index.php?dir=TeslaCoils/OtherPapers/

or directly:
http://deanostoybox.com/hot-streamer/index.php?dir=TeslaCoils%2FOtherPapers%2FCirc74%2F 

(download Part5_10.tif till Part5_16.tif and Part5_27.tif)

Best regards

Kurt"

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