Brooke Clarke wrote: > Hi Mike: > > What do you mean by "possible failure causes"? > For example are you trying to determine future reliability, like for a > space mission, or . . > do you have units that have failed and you want to know why, or . . > > Have Fun, > > Brooke Clarke > > I'll bet Mike has a legitimate reason for asking. I have gone through a spate of bad crystals in the past, and the experience was NOT pleasant. You will notice that I no longer design-in crystals, I use ceramic resonators. And I have never regretted the change. --Bob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist