When the first radios and telegraph lines were put into service, essentially the only way to communicate was to use Morse code. The first transmitters had extremely inefficient designs by today’s ...
A portable practice set in a case used for teaching telegraph and wireless operators Morse code. Spring-operated motor with winding crank on right side. A punched-paper tape is pulled around a spindle ...
A portable practice set in a case used for teaching telegraph and wireless operators Morse code. Spring-operated motor with winding crank on right side. A punched-paper tape is pulled around a spindle ...
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