Also consider the effect of load(s) on the transmission line: If there = are a number of loads, maybe even if there's just one load, the = effective (or loaded) characteristic impedance of the line is smaller = than your 71 ohms ... the unloaded impedance. This is especially true if the spacing between loads is relatively = uniform, and if they are closer together (or closer to the source) than = the length of a risetime of the signal. ------------------------------------------------------------------ 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: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: http://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