>Using a powdered iron core from eg Micrometals (Gargoyle >knows) would be cheap and tolerably good. Beware of clone >limitations of Micrometals products. All nominally equally >specd powdered cores are not created equal. Here in the UK W=FCrth inductors are readily available through RS. Coilcraf= t = are also readily available. The W=FCrth inductors are included in LTSpice, = not = sure what other makes they include. And who is ccfe? I thought you were at Jet. = -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist