[time-nuts] What interrupts aging?

Bob Stewart bob at evoria.net
Sun Feb 5 15:41:29 EST 2017

Hi John,
My experience, which is far from scientific, is that any disturbance to the Trimbles I use is like a slap in the face.  It can be just a momentary power loss or a large change in the EFC.  After either of these events, it goes into some period of retrace before it settles back down.  The longer the time or the bigger the EFC excursion, the longer it takes to settle back down.  But, as mentioned, I haven't done any real tests to measure the impacts.

Bob -----------------------------------------------------------------


      From: John Ackermann N8UR <jra at febo.com>
 To: Discussion of precise time and frequency measurement <time-nuts at febo.com> 
 Sent: Sunday, February 5, 2017 2:11 PM
 Subject: [time-nuts] What interrupts aging?
We know of OCXO that have been continuously running for years and have 
exceptional aging, supposedly as a result.

What does it take to interrupt that? A momentary loss of power?  The 
oven cooling down?  Some long period of off-time?  Or, once the 
oscillator has baked in will it return to that low aging once it has 
been powered up and thermally stabilized?

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