Originally Posted By: Taym
Originally Posted By: tfabris
https://www.youtube.com/watch?v=JrhKW20DIvA


OMG! OMG! It is actually ultrasound! And, no battery! Mechanical. I am in such disbelief that such a thing actually existed. laugh

I had one in my room growing up. Sometime around 1990 I think. Naturally, the TV was much older, probably late 70's? We certainly used to keep TVs much longer than today...
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Matt