Continuous wave
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A continuous wave, or continuous waveform, is an electromagnetic wave of constant amplitude and frequency, typically a sine wave, that for mathematical analysis is considered to be of infinite duratio
A commercially manufactured paddle for use with electronic keyer to generate Morse code
CW RGB semiconductor lasers
Archie Frederick Collins
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Archie Frederick Collins, who generally went by A. Frederick Collins, was a prominent early American experimenter in wireless telephony and prolific author of books and articles covering a wide range
Collins conducting experiment to use a human brain as a radio wave detector
Collins demonstrating an induction wireless telephone (circa 1903)
Advertisement for the Collins wireless phone for automobiles.