> Moving the crystal on the PCB suggests that the problem is worse in some
> positions compared with others  - though how you would determine a
> "good" position other than by trial and error I don't know.

That is where you go to your simulation specialist who deals in vibration. =
We have a bunch of guys who do all the thermal and vibration analysis of th=
e instruments we fly in space, as if it fails up there, you can't get it ba=
ck to analyse.

For a one-off you could try a university to see if they have a thermal and =
vibration analysis section. There will be some undergraduate somewhere who =
could do this as an exercise, or maybe even be set as a class exercise.



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