Søren Kjærsgaard

Did you know that crystal oscillators are orientation dependent? Well they are 😎

Albeit in the milliHz range for a 10MHz OCXO, the frequency change is completely measurable when you rotate the unit and change the crystals reference to earths gravity 🙂🙂

#rfengineering #hamradio #testandmeasurement

Apr 1 at 7:35pmWeb
Show threadAlexander KnochelApr 1
@oz1lqo Haha cool, I think this was completely swamped by temperature effects in my applications so far
Show threadSøren KjærsgaardApr 1
@Quantensalat might wery well be… 😂
Show threadKarl Matthias 🇺🇦Apr 1
@oz1lqo TIL!
Show threadvk3kriApr 1
@oz1lqo
hmm - How about a long term plot of the tidal effects from the sun and the moon!
Show threadKF7CCC AndrewApr 2
@oz1lqo Cool! It kind of reminds me of the color shift when you turned a CRT monitor upside down.
Show threadSøren KjærsgaardApr 2
@kf7ccc those were the days 🥰 That was (likely) due the the earths magnetic field, and not a gravitational pull of the electron beam ☺️
Show threadAndreas, DJ3EI, he/himApr 2

I wonder whether the effect you so convincingly demonstrate is actually caused by earth's gravitational or magnetic field.

What happens if you just rotate the osc on the table, without changing tilt?

@oz1lqo @kf7ccc

Show threadSøren KjærsgaardApr 3
@dj3ei @kf7ccc I did exactly that before I shot the video. It’s gravity 🙂