DescriptionEB1911 Telegraph - Marconi transmitter and receiver.jpg English: Guglielmo Marconi's early wireless telegraphy transmitter (left) and receiver (right)...
DescriptionEB1911 Telegraph - Marconi transmitter and receiver (2).jpg English: Marconi's wireless telegraphy transmitter consists of a nearly closed oscillating...
DescriptionEB1911 Telegraph - Marconi transmitter-receiver apparatus.jpg English: The usual forms of the receiving appliance which consists of a receiving...
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