Air-core power transfomers

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Original poster: "Marry Krutsch by way of Terry Fritz <twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>

Hi all.

	I've been interested in those solid state MOTs ever since someone here
mentioned them.  Since discarded microwaves are scarce around here
(that, or someone is beating me to them ;-)), I wanted to make one
myself to power a DC coil, and to feed smoother power to magnetrons.

	Anyway, I've got plenty of wire, but no ferrite for the core.  Can I
make an air core "MOT"?  What are the potential problems with this? 
Should I let the inductive reactance of the primary limit the current,
or should external limiting be used?  Does air "saturate" the way iron
does?  I'm thinking that operation at 50 kHz or so is good.  And now the
stupid question:  Does the primary (drive coil) need to be wrapped
around the secondary (driven coil)?  I thought that coupling would be
better in this case, but really don't know.  Thanks for any help.

Winston