This early communication method sends unmodulated continuous wave radio signals to transmit text information, typically via Morse code. Operators key a transmitter on and off to form dots and dashes, which a distant receiver picks up as audio tones. It formed the foundation of maritime and military radio communications before the advent of voice transmission.
He still maintains his amateur license and practices wireless telegraphy on the 40-meter band every weekend.
Also heard as
- radiotelegraphy
- CW
Related terms
Morse code
A character encoding scheme that transmits text as a sequence of short and long signal pulses.
CW
Continuous Wave, an unmodulated radio signal used primarily for Morse code transmission.
HF
High frequency designates the portion of the radio spectrum between 3 and 30 megahertz.
Shortwave
Radio transmissions in the high frequency band, between 3 and 30 megahertz, known for their ability to travel global distances.