[time-nuts] 10811 crystal orientation

[iovane at inwind.it]

I have another reading key.
When the manufacturer publishes the specs of its crystals, it
alrady took into account all of the possible known variables, 
some of them very tiny such as dependences on orientation 
(which do exist), so freeing the assembler (and the end-user)
from caring of.

(Anyway, on the issue of dependence on orientation, I feel
the standpoint of this group is a bit superficial. I would 
suggest a test. Those of you who have GPSDO or cesium and are
tracking the control voltage, please try rotating your 
oscillator, and make the voltage trace available to the 
group).

Antonio I8IOV

Rick Karlquist wrote:

>.........  However, the 10811 crystal
> package is free to rotate to any random angle, so the
> crystallographic orientation of a 10811 crystal would only be
> consistent if the production line proactively installed them
> in a certain orientation.  I don't remember ever hearing about
> anyone paying attention to how the crystals were oriented,
> in all my years of dealing with the 10811.  If it were important,
> knowing how HP did things, the crystal package would be indexed
> so that the orientation would not be up to the whim of the
> assembler.