hello, I am interested in the dielectric constant and dielectic loss factor of E-glass type fibers in function of frequency. I have searched the web and literature for data on this subject, but I have only found conflicting data. My interest is purely for +50MHz frequencies, the E-glass has a chemical composition as defined in IPC-EG-140: B2O3 (5-10%), CaO (16-25%), Al2O3 (12-16%, SiO2 (52-56%), MgO (<5%),Na+K2 (0-2%), TiO2 (0-0.8%), Fe2O3 (<0.4%), F2 (<1%) Your help is kindly appreciated. Data, references, brochures, ..., everything is welcome. Jan Vercammen Agfa [log in to unmask] ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################