Did you know you can use your frequency counter to detect gravity? You've likely done it before and you didn't even know it!
Dave demonstrates the phenomenon of 2g-tipover on quartz crystal oscillators in an Agilent 53131A frequency counter.
Related videos:
How a rubidium frequency standard works: https://www.youtube.com/watch?v=I55uLRRvLCU
FE-5680A Rubidium Standard Teardown: https://www.youtube.com/watch?v=FRdGsSu5Nec
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