| Code | Meaning | Sample use |
|---|---|---|
| QRG | Exact frequency | He's TX on a QRG of 14205 kHz |
| QRI | Tone (T in the RST code) | Your QRI is 9 |
| QRK | Intelligibility (R in the RST code) | Your QRK is 5 |
| QRL | This frequency is busy. | Used almost exclusively with Morse code, usually before transmitting on a new frequency |
| QRM | Man-made interference | There's another QSO up 2 kHz that's causing a lot of QRM |
| QRN | Natural interference, e.g. static crashes | The band is noisy today; There's a lot of QRN |
| QRO | Increase power | I need to QRO when propagation is poor. |
| QRP | decrease power | QRP 5 watts |
| QRQ | increase speed | Please send faster (opposite of QRS). |
| QRR | temporarily unavailable/away, please wait | I will be QRR 30 minutes./That station is QRR now. |
| QRRR | Distress | Distress call recommended by ARRL |
| QRS | Send slower | Please QRS, I'm new to Morse code |
| QRT | Stop sending | I've enjoyed talking to you, but I have to QRT for dinner now |
| QRU | Have you anything for me? | QRU, I'm about to sign off |
| QRV | I am ready | Will you be QRV in the upcoming contest? |
| QRX | will call you again | QRX @ 1500h |
| QRZ | You are being called by ________. | QRZ? You're very weak. (Only someone who has previously called should reply) |
| QSA | Signal strength | Your QSA is 5 |
| QSB | Fading of signal | There's QSB on your signal |
| QSD | Your keying is defective | You are QSD, check your transmitter |
| QSK | Break-in | I can hear you during my transmission, you may QSK |
| QSL | I Acknowledge receipt | QSL your last transmission. Please QSL via the bureau (i.e. please send me a card confirming this contact). |
| QSM | Repeat last message | QRM drowned your last message out - please QSM |
| QSO | A conversation | Thanks very much for the QSO (Morse abbreviation: TNX QSO 73) |
| QSP | Relay | Please QSP this message to my friend |
| QST | General call to all stations | QST: Frequency allocations have changed |
| QSX | I am listening on ... frequency | I QSX 14200 to 14210 kilohertz |
| QSY | Shift to transmit on ... | Let's QSY up 5 kilohertz |
| QTA | Disregard last message | QTA, I didn't mean that |
| QTC | Traffic | Please stand by for the DX bulletin |
| QTH | Location | My QTH is South Park, Colorado |
| QTR | Exact time | QTR is 2000 Z |