CW — Continuous Wave. Morse code.
Still enormously popular, because a narrow CW signal gets through when voice cannot. No longer required for any US license.
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Related words
- Gray line — The band of twilight moving around the earth.
- FM — Frequency Modulation. VHF and UHF voice.
- Frequency — How fast a radio wave oscillates.
- Watts — Transmit power.
- SWR — Standing Wave Ratio.
- Band — A range of frequencies set aside for a purpose.
- K index — How disturbed the earth's magnetic field is.
- APRS — Automatic Packet Reporting System.