Crystals Go to War: Piezoelectric Quartz Crystals for Radio

[Karl W4KRL]

This 40-minute documentary is a detailed look at how the Signal Corp.
processed raw quartz into radio crystals during WWII.

Crystals Go to War 1943 Reeves Sound Laboratories; Piezoelectric Quartz
Crystals for Radio
https://www.youtube.com/watch?v=b--FKHCFjOM&feature=player_embedded


*73 Karl W4KRL*
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