Morse Code Q-Codes Reference Manual
The complete operational guide to radiotelegraph Q-signals (QTH, QSL, QRM, QRN, QRP, QSY, QRZ, QSK). Explore functional families, question vs statement meanings, live audio playback, and real CW QSO dialogues.
Q-Code Audio Synthesizer Settings
Adjust speed & frequency before playing any Q-code audio below.
Q-Codes Categorized by Operational Family
Q-codes streamline telegraphic conversations by grouping distinct operational commands into 5 primary operational categories.
Signal Quality & Interference
Report man-made interference, natural atmospheric static, power levels, and fading.
Frequency & Tuning
Changing dial frequency, checking drift, and coordinating operating channels.
Station Status & Traffic
Managing turn-taking, break-in QSK, channel busy status, and time UTC.
Location & QSL Cards
Exchanging grid locators, geographic positions, and written confirmations.
Speed, Traffic & Weather
Adjusting sending speed, handling telegram count, and weather reports.
Complete Q-Code Chart (Question vs Statement)
Filter by family or search any Q-code by keyword, meaning, or Morse code dits and dahs.
| Q-Code | Morse Code | Question Meaning (With ?) | Statement / Answer Meaning | Family Category | Audio |
|---|---|---|---|---|---|
| QTH | --.- - .... | What is your location (position/latitude & longitude)? | My location is [City / Grid / Coordinates]. | Location & QSL | |
| QSL | --.- ... .-.. | Can you acknowledge receipt of my message / card? | I acknowledge receipt / I confirm contact (QSL card sent). | Location & QSL | |
| QRM | --.- .-. -- | Is my transmission being interfered with by other stations? | You are experiencing man-made interference (1=Nil, 5=Extreme). | Signal & Noise | |
| QRN | --.- .-. -. | Are you troubled by natural atmospheric noise/static? | I am troubled by natural atmospheric static crashes. | Signal & Noise | |
| QRO | --.- .-. --- | Should I increase transmitter power? | Increase power / Operating high transmitter power. | Signal & Noise | |
| QRP | --.- .-. .--. | Should I decrease transmitter power? | Decrease power / I am running low power (≤5 Watts). | Signal & Noise | |
| QSY | --.- ... -.-- | Shall I change frequency to [kHz/MHz]? | Change transmission frequency to [kHz/MHz]. | Frequency | |
| QRZ | --.- .-. --.. | Who is calling me? | You are being called by [Callsign]. | Station Traffic | |
| QSK | --.- ... -.- | Can you hear me between your signals (break-in)? | I can hear you between my signals / Operating QSK mode. | Station Traffic | |
| QRL | --.- .-. .-.. | Are you busy? / Is this frequency in use? | I am busy / This frequency is currently in use. | Station Traffic | |
| QRT | --.- .-. - | Shall I stop transmitting? | Stop transmitting / Shutting station down off the air. | Station Traffic | |
| QRV | --.- .-. ...- | Are you ready to receive? | I am ready to receive your transmission. | Station Traffic | |
| QSB | --.- ... -... | Are my signals fading? | Your signals are fading in and out. | Signal & Noise | |
| QRS | --.- .-. ... | Shall I send slower? | Send slower (e.g., QRS 12 WPM). | Speed & Control | |
| QRQ | --.- .-. --.- | Shall I send faster? | Send faster (increase keying speed). | Speed & Control | |
| QTR | --.- - .-. | What is the exact time UTC? | The exact time is [HHMM] UTC. | Station Traffic | |
| QRA | --.- .-. .- | What is the name / callsign of your station? | The name of my station is [Callsign/Station]. | Location & QSL | |
| QRG | --.- .-. --. | Will you tell me my exact frequency? | Your exact frequency is [kHz/MHz]. | Frequency | |
| QRH | --.- .-. .... | Does my frequency vary or drift? | Your frequency is drifting / varying. | Frequency | |
| QSU | --.- ... ..- | Shall I send or reply on this frequency? | Send or reply on this frequency [or on ... kHz/MHz]. | Frequency | |
| QRK | --.- .-. -.- | What is the readability of my signals? | The readability of your signal is (1=Unreadable to 5=Perfect). | Signal & Noise | |
| QSA | --.- ... .- | What is my signal strength? | Your signal strength is (1=Barely perceptible to 5=Very strong). | Signal & Noise | |
| QTC | --.- - -.-. | How many telegram messages do you have to send? | I have [Number] telegrams for you. | Speed & Control | |
| QRB | --.- .-. -... | What is the approximate distance between our stations? | The distance between our stations is [Nautical miles / km]. | Location & QSL | |
| QAM | --.- .- -- | What is the latest weather forecast for [Location]? | The weather report for [Location] is [Report]. | Speed & Control |
Understanding Q-Codes in Practical Telegraphy
Q-codes were developed under international radio regulations (ITU) to bridge language barriers across international maritime shipping and telegraph networks. Here are the core operational rules every CW operator needs to master.
Question vs. Answer Paradigm
Every Q-code operates as a dual-purpose shorthand. Sending QTH? asks "What is your location?". Sending QTH DALLAS answers "My location is Dallas". Never omit the question mark when inquiring!
QRM vs. QRN Distinction
A common beginner error is confusing QRM and QRN. Remember: M in QRM stands for Man-made (other transmitters, power line buzzers). N in QRN stands for Natural / Noise (lightning static).
QRP Low-Power Culture
Sending QRP signifies operating at 5 Watts RF output or lower. QRP operators often append /QRP to their callsign (e.g., W1AW/QRP) to highlight the accomplishment of long-distance contacts on minimal power.
â ī¸ The Mandatory QRL? Frequency Check Protocol
Before making any CQ call or tuning a transmitter on an apparently clear frequency, standard radio etiquette requires you to send:
If another station is using the frequency (or listening for weak signals), they will immediately respond with C (Yes), R, or QRL. If you hear no reply after waiting 5 seconds, you may proceed with your transmission.
Annotated CW QSO Exchange Using Q-Codes
Here is a realistic on-the-air Morse contact between station W1AW (Connecticut) and K6K (California) demonstrating Q-codes in action.
CQ CQ CQ DE W1AW W1AW K
Meaning: "Is frequency in use? This is W1AW. Calling any station, this is W1AW, go ahead."
Meaning: "W1AW, this is K6K. I am calling specifically you, please respond."
Meaning: "K6K from W1AW. Your signal report is 599 (Perfect). My location (QTH) is Newington, CT. My power is 5 Watts (QRP). Will you exchange QSL cards via the bureau? Over."
Meaning: "Received all solid. I have man-made interference (QRM) here from a local station. Shall we change frequency (QSY) up 2 kHz? Back to you."
Meaning: "Received, moving frequency to 7032 kHz. Fine business QSO, 73 (Best regards), thank you from W1AW. End of contact (SK)."
Frequently Asked Questions about Morse Q-Codes
What does Q-code stand for?
The "Q" in Q-codes signifies that all codes in the international radiotelegraph series begin with the letter Q (QAA through QZY). They were designed so that no standard English word or callsign prefix could be confused with an operating code.
Are Q-codes used in voice (SSB/FM) radio too?
Yes! Although invented for Morse telegraphy, many Q-codes (such as QTH for location, QSL for confirmation, and QSY for changing frequency) have become universal jargon across amateur radio phone (voice) and digital modes.
What is a QSL Card?
A QSL card is a written or digital postcard sent between radio operators confirming a successful two-way contact. It stems directly from the code QSL ("I acknowledge receipt").
What range of Q-codes is reserved for Amateur Radio?
Under ITU regulations, the block QRA to QUZ is assigned to general radiocommunication services, including maritime and amateur radio, while QAA to QNZ is allocated to aeronautical services.
đ Explore Related Tools & References
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