> The inductance changes dramatically when DC is present, so that's why I > want to measure it with DC present. But if I have it in an inductance > bridge, or hook it to an inductance meter, the impedance of whatever I use > to put DC current into it is put in parallel so it lowers the reading. Are you sure you are not just measuring the inductance change you expect? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist