Transistor radio

In 1948 the world of electronics was revolutionized with the appearance of transistors, the work of the American company Bell: semiconductor devices capable of interrupting, attenuating or letting an electric current flow. His invention won the 1956 Nobel Prize in physics to the three engineers John Bardeen, Walter Brattain, and William Shockley. This device allowed the appearance in 1953 of the first transistor radio, the work of the German company Intermetall.

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