>>>> It is. That's exactly the point of a balun. It adds impedence to the >>>> unwanted common mode signal while adding as little as possible to >>>> the real differential mode signal. > OK, I'll bite. =A0What exactly is wrong with this statement? Spilling era. Easily done. But, brain tends to not see such after a while. Mine anyway :-). http://en.wikipedia.org/wiki/Electrical_impedance R --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .