>The primary/secondary waveshape at 60 >hertz may be close to the same but a >transient may have a rise time faster >than the core can saturate, (absorb it), >voltage leads current lags. If the secondary is loaded by the filter-C, no problema. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end