TBr's While looking for a usable number for the R in R +-jx.I found these papers. (He is using .34% of the +reactance in ohms for a Q of 300)so the R s/b 1.4 and 2.8 instead of the 2 and 4 ohms I used. At any rate these papers are very interesting regarding top hats etc. http://www.cebik.com/linvert.html also found a L or C reactance calculator below http://control.gsnu.ac.kr/~f007dan/cicuit/XLC.htm Bud W0HG