When I was a lad designing telecom kit that had a minimum design life of 20 years, we used Sprague tantalum cased glass sealed capacitors that were treated like gold dust.
Sprague has now been subsumed into Vishay and they still do the same devices, stocked by Mouser and Digikey at reasonable prices, so long as you don’t go for the aerospace versions. John _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.