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.
How a rubidium frequency standard works
FE-5680A Rubidium Standard Teardown
David looks at the pins on the Padauk PMS150 programmer for potential reverse engineering. TLDR; ...