Air cored mutual inductance calculator

[paul-at-abelian.demon.co.uk (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

While trying to design an air cored coupling transformer
for a CW coil, I ended up putting together a little program to
calculate primary and secondary self inductances, mutual inductance,
and coupling coefficient.

I thought it might be useful to others so I've put it under

   http://www.abelian.demon.co.uk/acmi/

It's intended for tesla coils and magnifier driver transformers, 
CW driver impedance matching, that kind of thing.

Handles any profile of single layer windings - straight
solenoids, cones, flat spirals, whatever, so long as all the turns
are more or less concentric. Works by summing the inductance
between current filaments. Probably good to 5% or so.

Written in C, just using the standard libraries so should compile
and run on any computer, maybe even windoze. A slight alteration
and it'll do 3 or more windings if required.

Have fun! It works for me, but I've only tried it on a few coils.
Let me know how you get on with it.

Regards,

--
Paul Nicholson,
Manchester, UK.
--