Q Codes and On-Air Etiquette: How a Standard QSO Runs, Start to Finish
The first move is not CQ
The classic rookie mistake is finishing the license exam, walking into the shack, and immediately calling CQ at full volume. The correct first move is to listen.
Before your first transmission, spend at least a day on the air doing nothing but listening. Watch how experienced operators call, answer, chat and close a contact. You’ll pick up the rhythm of the band — where conversations sit, how quickly people move — and you’ll avoid building habits that are hard to unlearn later. Listening has a second, practical benefit: it tells you whether the frequency you want is actually free.
Calling CQ: three times, then your call sign
When you call all stations — anyone who answers — the standard form is:
- Say “CQ” three times
- Give your call sign, spelled phonetically at least once
- Finish with something that invites a reply
For example: “CQ CQ CQ, this is Bravo Delta Four X-ray X-ray X-ray, calling CQ and standing by.”
The phonetic alphabet (the ITU standard: Alpha, Bravo, Charlie…) exists because letters get eaten by noise and fading. When propagation is rough, “Delta Four” survives where “D4” doesn’t. Learn to spell your own call sign without thinking. On a bad day it is the only thing that gets through.
Answering: their call first, then yours
When you hear someone calling and want to answer, the order matters: give the other station’s call sign first, then your own. The order is not arbitrary — the caller needs to know within the first second that this reply belongs to them.
During a normal conversation both stations repeat both call signs every few transmissions, so that even when the signal fades up and down everyone still knows who they are talking to. End each turn with “over” so the other station knows it is their go.
One thing to be clear about: the content of a QSO must be open and in plain language. Codes, ciphers and disguised messages are not permitted in the amateur service — that is one of the hobby’s founding rules, written into national regulations around the world. Operators stick to plain speech, call signs and the standard abbreviations, and the ITU conventions (see the references) govern how question-and-answer signals are used.
Closing: 73 is enough
To end a QSO, wish the other station well with 73, say goodbye, and say you are clearing the frequency:
“Seventy-three, thanks for the contact. Bravo Hotel Four Lima Oscar X-ray, this is Bravo Hotel Four Lima Oscar Tango, clear of the frequency and listening.”
One detail worth getting right: “73” already means “best regards.” Saying “best 73s” or “sincerest 73” marks you as a newcomer — experienced operators hear it as padding. Just send the number and move on.
The Q codes worth knowing
Q codes are the international shorthand of radio: three-letter groups starting with Q that carry a standard question or answer. They started in the Morse era, survived into voice, and are used by amateurs as well as maritime and aviation services. Grouping them by situation makes them easy to learn.
Calling and answering
- CQ — general call to any station
- QRZ — “who is calling me?” (or “someone is calling you”)
- QRV — “are you ready?” / “I am ready”
- QSL — “can you confirm receipt?” / “I confirm”
Signals and interference
- QSA — signal strength on a 1 to 5 scale
- QRM — man-made interference, 1 to 5 scale
- QRN — natural noise (static), 1 to 5 scale
- QSB — fading
- QRK — readability of your signals
Frequency and operation
- QRL — “is this frequency busy?” / “it’s busy, keep clear”
- QSY — change frequency
- QRP — low power
- QRO — high power
- QRS — send slower
- QRQ — send faster
- QRT — stop transmitting
Basic questions
- QSO — a contact (“can you communicate with…?”)
- QRU — “anything for me?” / “nothing for you”
- QTH — your location
- QRA — your station name
- QRG — exact frequency
- QTR — correct time
A handy memory aid: QRM is “M for man-made,” QRN is “N for natural.” Need to move? QSY. Done for the day? QRT. Asking location? QTH. Asking station name? QRA.
RST: how to report a signal
The RST system is how you describe what you hear:
- R — readability, 1 to 5
- S — strength, 1 to 9
- T — tone, 1 to 9 (CW only)
On voice you send two digits — 59 means perfectly readable and very strong. On CW you send three — 579, for example. “59” is the polite standard for a good signal on phone, but it should mean something. If you can only copy half the words, a 43 or 44 tells the truth, and a truthful report is more useful than a flattering one.
Etiquette on a shared band
Beyond the technical script, there is an unwritten code:
- Operate only within your license privileges — band edges, modes and power
- Never use aeronautical, distress or other protected frequencies
- No business or commercial traffic, ever
- Don’t camp on a frequency for hours, especially a calling frequency shared by everyone
- Listen before you transmit, and if the frequency is in use, move
- Give honest signal reports
- Keep it friendly — the DX Code of Conduct (linked below) is a good summary of how the community expects people to behave
The point of all of it
Etiquette on the air is not a list of commandments. It comes down to making the other station’s job easy: a clear call sign, an honest report, a frequency quickly freed. Do those three things and you will be welcome on any band.
References
- ITU-R Recommendation M.1172, Miscellaneous Abbreviations and Signals (Q-code conventions), ITU, 1995
- Wikipedia, “Q code” (amateur usage of Q groups), accessed 2026
- Wikipedia, “RST code” (readability–strength–tone system), accessed 2026
- The DX Code of Conduct, dxcode.org
- ARRL, The ARRL Operating Manual, American Radio Relay League (on-air practice and conventions)