Hi Stuart: The ROT I use is 20nH/in. BTW, I verifed this using a 2D extractor and increasing the boundary distance far away from the wire to minimize mutual indutance. Hope this helps -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Stuart Brorson Sent: Thursday, September 04, 2003 12:53 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Inductance of wire section Hi gang -- Please pardon me if this is a FAQ, but does anybody have a quick rule-of-thumb for the inductance to expect from a 1 cm length of 22 gauge wire-wrap wire in free space? Yes, I've searched the web & looked at a few pages which are far too detailed to be really useful -- all I want is an order-of-magnitude number, and the websites are all about calculating the number by integrating Maxwell's equations. So far, I've been using a figure of around 360 nH/m, which is the inductance of a common 50ohm transmission line. If the real number is larger or smaller by a factor of 2 to 5 I don't care a lot, but I would like to make sure that the "rule-of-thumb" number is *not* orders of magnitude larger or smaller than this. What rule-of-thumb do you use? Stuart ------------------------------------------------------------------ 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 ------------------------------------------------------------------ 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