[time-nuts] OCXO sensitive to gravity

[SAIDJACK at aol.com]

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.