🚀 go-pugleaf

Howdy.

   Does anyone have any info on how to calculate inductance and such
for a spiral coil.  (When I say spiral coil I mean a coil that is wound
like a record; wound in 2 dimensions.)
Or how about going the other way?  I'm planning on making such a coil, 
and I know what the inductance should be, but I need to know how big
to make it.  Things that I know :

	- Inductance
	- Inside diameter.  The coil will not start in the middle, so it
	  will end up looking more like a flat doughnut.
	- Diameter of wire.


   Things I need to calculate :

	- Length of wire.
	- Number of turns (which is easily derived from length of wire).


   Is there anything I'm missing?


   If possible, please e-mail replies; I don't get a chance to read this
news group very often.

   Thanks.

Jon
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