Barry/Alcon: - Basic requirements for EMI shielding are listed in Requirement 61 of MIL-HDBK-454 and reference the old Mil-Std test methods (461, 462, 469, Mil Hdbk-253 and NTIA Manual). You might check the Mil-Specs and see if they reference the needed information. Hope (but doubt) that the above helps. Regards, Jim Moffitt, Technical Director, Electronics Training Advantage, Indianapolis IN ############################################################## 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. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################