Just the other day I was looking at a simple schematic for a regenerative receiver in EMRFD. After some thought, I realized that it reminded me of a tesla coil! Two LC resonant circuits, coupled at the inductors like a transformer. I really hadn't been expecting to see that. -- Paul Anderson VE3HOP wackyvorlon@gmail.com http://www.oldschoolhacker.com "May the electromotive force be with you." -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist