Try arlon or Rodgers. If you look at the last valid QPL, you'll find that both of these companies are/were qualified for GR7. Customer service at either should be able to narrow things down further. Eric Kalgren Electrical Engineer Cobham Defense Electronic Systems Continental Microwave Division 11 Continental Drive Exeter, NH 03833 USA Tel: 603-775-5200 Fax: 603-775-5201 E-mail:[log in to unmask] Website: http://www.cobhamdes.com -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Marty W. Sheppard Sent: Monday, March 26, 2007 8:47 AM To: [log in to unmask] Subject: [TN] Approved Substitute for Mil-P-13949/7 (GR) We have an old drawing that calls for the material to be: MIL-P-13949/7 (non-woven glass (GR) and polytetrafluoroethlyene resisn) for MICROWAVE applications; p/n GRN0310B1/B1B1C I cannot find a direct sub when looking through the IPC4101 slash sheet index. Can anyone tell me what material is used today for this requirement? Thanks. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------