[time-nuts] Symmetricom chip scale atomic clock

Bob Camp lists at rtty.us
Fri Apr 25 11:09:54 UTC 2014


If you go back to the original EMXO work done by PTI and Bendix - they had a very similar issue with seals. They worked fine, ran through all the testing, met all the mil spec testing. After sitting on aging for months / years the seal would go “pop” (a nice loud pop) and the vacuum when away. This sort of thing does happen even when all the T’s have been crossed and every last i is dotted.


On Apr 24, 2014, at 11:32 PM, Jim Lux <jimlux at earthlink.net> wrote:

> On 4/24/14, 6:26 PM, Said Jackson wrote:
>> Hi Magnus, Bob,
>> Thanks much for your kind words.
>> The failure rate is thankfully so low that we are not greatly alarmed, and Microsemi has been a champ in resolving any failures with/for us when they did show up. We are awaiting the results of the full re-qualify that Microsemi is doing on the CSAC and were going to announce the issue at that time..
> Sometimes it is the low failure rates which make it so troublesome. Everyone gets excited, but the vast majority don't have the problem, but then, every little anomaly or unexpected event prompts a "is it the failure"...
> Good luck..
> JIm
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