It was 1919—the world was recovering from a pandemic.
— Brian Roemmele (@BrianRoemmele) December 6, 2020
In a garage Frank Conrad was building a mobile telephone—he called it 8XK.
Hobbyists built crystal devices and heard his tests.
What did he invent?
Broadcast radio—sent music around the world.pic.twitter.com/GwZRjYlpPQ
via Twitter https://twitter.com/BrianRoemmele
December 06, 2020 at 11:49PM
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