I posted this once before and got little response. Sorry for the repeat! I'm working on an RFID project and need to make a 208uH loop antenna. I'd like to try to do it as a rectangular spiral trace on a circuit board. Can anyone suggest a resource on calculating the inductance of such an inductor? THANKS! Harold -- FCC Rules Online at http://www.hallikainen.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body