I have a couple of things in mind and I would like a source for those BIG toroidal ferrite cores. I can deal with painting the wire and wrapping it because you don't need that many turns. Really I can strip some 10 guage or something, maybe even fatter.

This of course yields what the problem is _ I want like an ID of AT LEAST an inch, a thickness of ¼ inch or better which gives an OD of 1½". The height should be approximately ½ - ¾ inch.

J