Remember that the SC cut is doubly rotated, so the crystallographic axes are tilted relative to plane of the blank. These angles are published in papers on the SC cut and controlled to extremely tight tolerances (a few seconds of arc). 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.
Rick Karlquist N6RK _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
