[time-nuts] OCXO sensitive to gravity

Lux, Jim (337C) james.p.lux at jpl.nasa.gov
Sun Aug 16 04:36:28 UTC 2009


Or at least that provides a reason to question the "inherited design"..


On 8/15/09 5:32 PM, "SAIDJACK at aol.com" <SAIDJACK at aol.com> wrote:

> Hi James,
> 
> the kind of experience that makes one a better engineer :)
> 
> bye,
> Said
> 
> 
> In a message dated 8/15/2009 14:35:41 Pacific Daylight Time,
> james.p.lux at jpl.nasa.gov writes:
> 
> 
> Yes.. In our case, though, I think the microphonics were from  movement of
> the cavity lid, which wasn't very rigid. The lid moved, moving  the tuning
> screw, which moved the little tuning plate suspended over the  ceramic puck.
> It was a prototype to be sure, so the production item  wouldn't be as bad,
> but that sort of thing convinced me that anything we  could do to reduce the
> amount of touch labor needed was to the  better.
> 
> 
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