Hi again, To help further my understanding of the subject, please could You answer this question: Is an air core inductor of 1000 winds equivalent to an air core inductor of 100 winds each on 10 layers? Thanks! Mario --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .