[time-nuts] Quartz oscillator slow drift/aging
Bob kb8tq
kb8tq at n1k.org
Thu Dec 5 13:05:12 UTC 2019
Hi
That’s unexpected on an OCXO that may have been power off for a
decade or more. Let it run for a month and see how it’s doing then.
Bob
> On Dec 2, 2019, at 2:30 PM, AC0XU (Jim) <James.Schatzman at ac0xu.com> wrote:
>
> Time Gurus-
>
> I have a FPS 1150A quartz oscillator with the 1 PPS disciplining option. With the frequency control set to "manual" I can use the digital thumbwheel control to set 10 MHz correctly. However, for two weeks there has been a steady drift upwards of about 2E-10 per day. I have not seen this behavior in other similar oscillators - the magnitude of the drift seems greater than expected. Any ideas what could be happening? I have no idea how long the unit was unpowered before I got it - it needed repairs - it may have been years. Is this normal? Should I expect the drift to decrease over time? Etc?
>
> Thanks!
>
> Jim
>
>
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