On Mon, Aug 3, 2015 at 11:11 PM, Uwe Pobel <dk4ww at gmx.net> wrote: > http://web.stanford.edu/class/ee360/previous/lectures/lecture11.pdf > > > http:\\www.dk5ya.de/newtower14.html > > ============= Now THAT was an outstanding post!! 73, Tony KT0NY