Alan, A difficult and increasing problem. In defence industry, fitted component operational life is becoming an ever longer feast while component availability is an ever shorter honeymoon. Such is life! One answer, I think open to non-BAE SYSTEMS companies but apologies to others if not, Richard G. Parker Principal Reliability Engineer Operations-PAG BAE SYSTEMS Electronics Ltd +44(0)1245 242267 Also, more generally, Component Obsolescence Group (COG) c/o TMT Associates Harpenden +44(0)1582 762934 And two companies who specialise in long term storage problems, etc, John Jones IGG Component Technology Ltd Fareham +44(0)1329 829311 Eltek Semiconductors Ltd Norman vincent Dartmouth +44(0)1803 834455 Hope these can help you. I do not class myself as an expert so please do not contact me for advice. Barry L. Bates (Producibility Engineer) 01983 20 2629 [log in to unmask] BAE SYSTEMS Newport Rd Cowes Isle of Wight PO31 8PF -----Original Message----- From: Alan Peters [SMTP:[log in to unmask]] Sent: 08 February 2001 13:32 To: [log in to unmask] Subject: [TN] Extending the lives of components. *** WARNING *** This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message. Hello Does anyone have any ideas where I could find out more information by "constructional type" of the predicted life and failings, due to ageing, of discrete high reliability /military standard electronic components? We want to have confidence that electronic components fitted to a 25 year old system will continue to function for 35 years. These components are in a sealed ( non hermetic) benign environment rarely being powered up. Does anyone have any histories/references by "constructional type" of discrete electronic components degrading and failing due to age? Alan Peters Failure Analysis Engineer BAE SYSTEMS Plymouth ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender immediately by telephoning +44(1252) 373232. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** ------------------------------------------------------------------------------- -- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext. 5315 ------------------------------------------------------------------------------- -- ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender immediately by telephoning +44(1252) 373232. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------