Morse code
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Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. It is named after Samuel
This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur.
Single needle telegraph instrument
Telegraph key and sounder; the signal is "on" when the knob is pressed, and "off" when it is released, length and timing of the dits and dahs are entirely controlled by the telegraphist
Morse code receiver that records on paper tape
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