Hi In the case of the Temex Rb’s in their “reliability sample”, I have hard evidence in front of me that their MTBF numbers were *wildly* optimistic. If their numbers were correct, it would be impossible for me to have as many broken ones in front of me as I do.
Bob > On Mar 27, 2016, at 7:11 PM, Attila Kinali <att...@kinali.ch> wrote: > > On Sun, 27 Mar 2016 10:13:32 -0400 > Bob Camp <kb...@n1k.org> wrote: > >> The “typical life” numbers on the tubes in the various Cesium standards >> are fairly accurate. Most units that are well cared for “die” when the tube >> goes out and come back to life when it’s replaced. The tube life dominates >> the MTBF in this case. > > Lifetime is only one variable I am interested in. I suspect that most > of the standards have a much longer lifetime than their MTBF between > intermittent faults. E.g. Chirstopher Ekstrom reported at FSM8 that their > newly build Rb fountains show a frequency jump once in a while. After a > restart of the fountain it's back to normal. > > > Attila Kinali > > -- > Reading can seriously damage your ignorance. > -- unknown > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
