Modern Technologies That Are Way Older Than You Think
Car radio - 1919
Yes, those are radio wires strung between the front and rear of a car. A. H. Grebe, a radio manufacturer from New York, tested out an early version of a car radio that would later come to define a budding car culture of the 1920s. Grebe's set up includes the vacuum tube in the backseat, a small motor to power the vacuum tube, and a separate battery to power the radio itself.
