Hi Mario: Shameless plug, A Fly Back tester is great for testing inductors like=20 this. It hits the inductor with a pulse and counts how many cycles of=20 ringing follow. Just as it takes a specialized tester (ESR meter) to=20 locate some bad capacitors it also takes a specialized tester (FB=20 tester) to locate some bad inductors. http://www.prc68.com/I/ESRmicro.shtml#FBTest --=20 Have Fun, Brooke Clarke http://www.PRC68.com --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .