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Guglielmo MarconiWhen Marconi built his first radio it was set to a specific frequency to match the receiver/transmitter that he was going to communicate with...variable tuning came later. The transmission was not voice, but "Click" code.
The advent of commercial radio "Stations" and broad use brought about the need for variable tuning.
So the FIRST radio would have had one hard frequency setting at a time.
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