hi suresh 1. Free space VELOCITY(FSV) IS ~300 MILLION METERS/SEC 2. pcb VELICITY IS FSV /SQRT DIELECTRIC CONSTANT 3. DIELECTRIC CONSTANT VARIES BUT ONLY SLIGHTLY WITH FREQUENCY. cHECK DATA SHEETS. RON MILLER -----Original Message----- From: Suresh.K [mailto:sureshk@xxxxxxxxxxxxxx] Sent: Wednesday, March 26, 2003 3:10 AM To: si-list@xxxxxxxxxxxxx Subject: (no subject) Hi experts, I would like to know , Is there any calculator avilable for calculation of the signal time delay percentage for different pcb dielectric materials based on frequency. Thanks in advance ...... Regards, Suresh.K C-DOT,B'lore-52. ------------------------------------------------------------------ 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