My reply seems to have disappeared. We used GB522 long ago, before Rogers and Arlon and Taconic came with their modern products. I'll see if I can find any old references. /Inge -----Ursprungligt meddelande----- Från: TechNet [mailto:[log in to unmask]] För McGlaughlin, Jeffrey A Skickat: den 24 mars 2008 20:10 Till: [log in to unmask] Ämne: Re: [TN] Dielectric Board material Eric - I haven't seen any replies so I will put this out to see if it helps. In the realm of MIL-S-13949 GB/GBN was Laminate, Woven E-glass reinforced, polyfunctional epoxy resin, hot strength retention the 522 would be 52.2 mils thick. I don't now of any companies who made materials under this spec but a search of the QPL might yield something. Good Luck, Jeffrey McGlaughlin, CID Engineering Designer Battelle 505 King Avenue Columbus Ohio 43201-2693 (614)424-7582 Phone (614)458-7582 Fax -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Eric Kalgren (Cobham DES SSA) Sent: Friday, March 21, 2008 4:08 PM To: [log in to unmask] Subject: [TN] Dielectric Board material Have any of you ever heard of "GB 522" as a type of dielectric board material? I have a drawing from 1968 that calls out "GB 522, 1/16 THK, Close Tol 1OZ CUY 1 Side." Its an RF board so I'm guessing that the material is something like Duroid but I'm not sure. Any help will be appreciated! Thanks, 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]<mailto:[log in to unmask]> Website: http://www.cobhamdes.com<http://www.cobhamdes.com/> <mailto:[log in to unmask]> --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------