From Raw Crystal to Crystal Oscillator: Crystals go to War in 1943

Many thanks to SWLing Post contributor, Mark (AE2EA), who shares the following AWA video about crystal production during WWII:

Click here to view on YouTube.

Thank you so much for sharing this, Mark. I posted the original film of this a few years ago, but it appears that the YouTube account has been deleted. I’m grateful the Antique Wireless Association has published this. Thank you for the tip!

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