From Raw Crystal to Crystal Oscillator: Crystals go to War in 1943
by Thomas from The SWLing Post on (#62AF0)
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 [...]