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Summary
Français : Poste a galène montage en Tesla, à cadres circulaires tournants pour l'écoute de la bande hectométrique et de la bande kilométrique.
English: An antique crystal radio, using a cat's whisker detector. The rotating concentric coil device was an adjustable antenna coupling transformer called a 'loose coupler', which improved interference rejection
Nikola Tesla (1856–1943) Serbian American inventor and engineer who discovered and patented the rotating magnetic field, the basis of most alternating-current machinery. He also developed the three-phase system of electric power transmission. He immigrated to the United States in 1884 and sold the patent rights to his system of alternating-current dynamos, transformers, and motors to George Westinghouse.
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