[time-nuts] OCXO sensitive to gravity

[SAIDJACK at aol.com]

Hi Warren,
 
that's a smart idea.

It's fun to try different OCXO types out for their individual  
sensitivities. I have seen some that are only sensitive in one single axis,  others that 
react on several axie.
 
To take your concept further, one could also orient the OCXO to minimize  
the effect of vibration as well (caused by e.g. power supply transformers,  
fans, walking in the room etc).
 
If I read the post correctly, someone said they can literally "talk" to  
their DRO, and make the voice come out of their Spectrum Analyzers FM  
demodulation loudspeaker. After all, crystals are quite microphonic as  well.
 
bye,
Said
 
 
In a message dated 8/15/2009 09:46:46 Pacific Daylight Time,  
warrensjmail-one at yahoo.com writes:

When  possible, the thing I do to eliminate the effect of small 
gravitational  changes or tilt 
from effecting the Freq of my Oscillators, is to orientate  their case so 
that the osc is approximately at its MAXIMUM 2G turn over axes.  
This gives the osc a null to small gravitational changes, much the same as  
setting the temp of an oven to the zero TC freq turn over point.
To  optimize further, the axes can be fine adjusted so that a small tilt in 
any  direction causes the same direction in freq shift.
The improvement achieved  can be quick substantial like 100 to 1 
improvement.  

ws