I require a 50 ohm transmission line fabricated on a duroid PCB with Er = of 10.5, board thickness 2.54mm. My calculations suggest 2.17mm width? = Can anyone confirm this or suggest otherwise? Thanks Steve Rogers B.Eng(Hons) C.Eng IEE RF Design Engineer Micromill Electronics Limited email: srogers@xxxxxxxxxxxxx Tel : +44 (0) 2392 366600 Fax : +44 (0) 2392 366673 Website: http://www.micromill.com Micromill Electronics Limited Leydene House Waterberry Drive Waterlooville Hampshire PO7 7XX United Kingdom Registered No. 1456922 (England). Registered Address: Brook Road, = Wimborne, Dorset, BH21 2BJ. THIS EMAIL AND ANY ATTACHED FILES ARE CONFIDENTIAL AND MAY BE LEGALLY = PRIVILEGED=20 If you are not the addressee, any disclosure, reproduction, copying, = distribution, or other dissemination or use of this communication is = strictly prohibited. If you have received this transmission in error = please notify the sender immediately and then delete this e-mail. It is the policy of Micromill Electronics Limited that no legally = binding statements, representations or commitments (collectively = 'statements') may be made by e-mail. Any such statements must be = confirmed either by facsimile transmission or by post before they will = have legal effect. The sender of this e-mail is not authorised to = commit the company in any way and the addressee is hereby formally = notified of that fact. ------------------------------------------------------------------ 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