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Cikakken tarihin ƙirƙirar rediyo: Gwajin Hertz tare da tazarar tartsatsi, ƙirƙirar haɗin gwiwar Branly, da sadarwar farko ta hanyar transatlantic ta Marconi. Yadda damped oscillation suka samo asali zuwa wayar tarho mara waya.