Lee wrote: I believe the notion that right angle bends are a source of problems stems from an error in the Motorola ECL handbook published in 1974 and still in print with the error. Now O Semiconductor publishes it. ************************************************************************ ** You're dating several of us Lee :) =20 Motorola MECL SYSTEM DESIGN HANDBOOK Page 144, Figure 7-17: Reflections Caused by Signal-Line Shape Variations What always puzzled me, was if you look closely at the figure, you'll see what looks like a VIA at the right angle bend, but nothing at the smooth curve. I was always wondering if the test setup actually had a VIA at the bend :) Mark ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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