hi all , here are some of my simple questions, may u might help me. 1. why wires and printed circuit boards require special consideration when used at RF frequencies. 2. what are these considerations, pdf or links may help me. thanks in advance. rishi. Yahoo! India Matrimony: Find your partner online.Post your profile. ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu