Ham Radio Q Codes, Abbreviations and Slang Explained

Every Q code, abbreviation and piece of slang you will hear on the air, in plain English.

Q codes

  • QSL — Acknowledged. Understood.
  • QSO — A conversation.
  • QTH — Location.
  • QRZ — Who is calling me?
  • QRM — Interference from other stations.
  • QRN — Natural noise and static.
  • QRP — Low power operating.
  • QRO — High power. The opposite of QRP.
  • QRT — Shutting down. Going off the air.
  • QRX — Stand by. Wait.
  • QRL — Is this frequency busy?
  • QSY — Change frequency.
  • QSB — Fading.
  • QSK — Full break-in.
  • QSP — Relay a message.
  • QST — A general call to all amateurs.
  • QSX — Listening on a different frequency.
  • QRV — Ready.
  • QRU — Do you have anything for me?
  • QRS — Send slower.
  • QRQ — Send faster.
  • QRG — Your exact frequency.
  • QSA — Signal strength.
  • QTR — The correct time.

Heard on the air

Operating

  • CQ — Calling anyone who is listening.
  • DX — Distance. A far-away station.
  • Pileup — Everybody calling one station at once.
  • Net — A scheduled on-air gathering.
  • Net control — The operator running a net.
  • In and out — Checking into a net without staying.
  • Mobile — Operating from a vehicle.
  • Portable — Operating away from home.
  • Simplex — Radio to radio, no repeater.
  • Repeater — A relay station, usually up high.
  • POTA — Parks on the Air.
  • SOTA — Summits on the Air.
  • Field Day — The biggest weekend in amateur radio.
  • Contest — A competitive operating event.
  • RST — The signal report system.
  • Grid square — Your location as a short code.
  • ARRL — The national association for amateur radio in the US.
  • VE — Volunteer Examiner.
  • Park reference — The code that identifies a POTA park.
  • Hunter — Someone chasing park activators.
  • Activator — Someone operating from a park or summit.
  • Spot — A public post saying who is on the air and where.

Gear

  • HT — Handy Talkie. A handheld radio.
  • PTT — Push To Talk.
  • Rubber duck — The stock antenna on a handheld.
  • Transceiver — A transmitter and receiver in one box.
  • Antenna — The thing that actually radiates your signal.
  • Dipole — Two legs of wire.
  • Yagi — A directional beam antenna.
  • Vertical — An antenna that stands straight up.
  • Tuner — Matches your antenna to your radio.
  • Feedline — The cable from radio to antenna.
  • VOX — Voice Operated eXchange.
  • SDR — Software Defined Radio.

Technical

  • Frequency — How fast a radio wave oscillates.
  • Band — A range of frequencies set aside for a purpose.
  • SWR — Standing Wave Ratio.
  • CW — Continuous Wave. Morse code.
  • SSB — Single Sideband. HF voice.
  • FM — Frequency Modulation. VHF and UHF voice.
  • FT8 — A weak-signal digital mode.
  • RTTY — Radio Teletype.
  • SSTV — Slow-Scan Television.
  • APRS — Automatic Packet Reporting System.
  • Propagation — How your signal travels.
  • Ionosphere — The layer that bounces HF signals back to earth.
  • Gray line — The band of twilight moving around the earth.
  • Sporadic E — Sudden short-lived openings.
  • Solar flux — A number that tracks solar activity.
  • K index — How disturbed the earth's magnetic field is.
  • Simplex vs duplex — One frequency versus two.
  • CTCSS / PL tone — A sub-audible tone that opens a repeater.
  • Offset — The gap between transmit and receive frequency.
  • Watts — Transmit power.
  • Wavelength — The physical length of one radio wave.

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