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Q-Codes
27 entriesInternational Q signals used in amateur radio (CW and voice). Sent as a question or an answer — QTH? asks 'where are you?', QTH answers it.
| Name / Channel | Details |
|---|---|
| QRA | What is the name of your station? / My station is… |
| QRG | What's my exact frequency? / Your frequency is… |
| QRK | What is my readability? (1–5) |
| QRL | Is this frequency in use? Always send 'QRL?' before calling CQ on CW. |
| QRM | Man-made interference (other stations, noise from electronics). |
| QRN | Natural noise — static, lightning crashes. |
| QRO | Increase power / running high power. |
| QRP | Reduce power / running low power (≤5 W CW, ≤10 W SSB). A whole hobby in itself. |
| QRQ | Send faster. |
| QRS | Send more slowly. Don't be shy about asking. |
| QRT | Stop sending / shutting down the station. |
| QRU | Have you anything for me? / I have nothing for you. |
| QRV | Are you ready? / I am ready. |
| QRX | Stand by — I'll call you again at… |
| QRZ | Who is calling me? (Also the name of the famous callsign-lookup site.) |
| QSA | What is my signal strength? (1–5) |
| QSB | Your signal is fading. |
| QSK | Full break-in CW — I can hear between my own dits. |
| QSL | I acknowledge receipt / do you confirm? Also the postcard hams exchange to confirm contacts. |
| QSO | A radio contact/conversation. |
| QSP | Will you relay to…? / I will relay. |
| QST | General call to all amateurs (also ARRL's magazine). |
| QSX | I am listening on … (split-frequency operation). |
| QSY | Change frequency to… |
| QTC | I have a message to send. |
| QTH | What is your location? / My location is… |
| QTR | What is the correct time? |