Q-Code Library
Q-signals commonly encountered in amateur radio operating, from QRL (frequency busy?) to QTR (exact time), with formal or historical definitions kept separate from modern amateur usage.
One of the original ITU Q-codes, but largely historical in modern amateur practice — operators simply state their callsign direct…
QRG Exact frequency checkตรวจสอบความถี่ที่แน่นอนStill genuinely used in amateur practice — asking for a QRG check is a normal way to confirm your actual transmit frequency, espe…
QRH Frequency stabilityความคงที่ของความถี่A technical check for frequency drift or chirp — more of a diagnostic term than everyday conversational Q-code, mainly heard amon…
QRI Tone quality (historical)คุณภาพโทนเสียง (เชิงประวัติศาสตร์)Historically asked the same question the Tone (T) digit in an RST report now answers directly. Largely superseded by RST in moder…
QRK Readability (1-5 scale)ความชัดเจน (สเกล 1-5)A separate readability-only report on a 1-5 scale, historically paired with QSA (strength, also 1-5) on phone. On CW the RST repo…
QRL Frequency in useความถี่กำลังใช้งานอยู่Standard courtesy before calling CQ: send "QRL?" (or say "is this frequency in use?") and pause. If no reply, the frequency is as…
QRM Interference (man-made)สัญญาณรบกวน (จากอุปกรณ์/สถานีอื่น)Refers to interference from other stations, electrical equipment, or man-made RF sources — as opposed to QRN (natural/atmospheric…
QRN Static / atmospheric noiseสัญญาณรบกวนจากธรรมชาติ (ฟ้าผ่า/บรรยากาศ)Natural noise — lightning static, atmospheric crashes, thunderstorm activity — as opposed to QRM, which is man-made. Operators di…
QRO Increase powerเพิ่มกำลังส่งFormally an instruction about transmitter power. In everyday amateur talk, "running QRO" describes high-power operation generally…
QRP Decrease power / low-power operatingลดกำลังส่ง / การเล่นวิทยุกำลังส่งต่ำThe formal Q-code is simply an instruction to reduce power. Amateur radio has built an entire popular sub-discipline around the s…
QRQ Send fasterส่งให้เร็วขึ้นUsed on CW to request a faster sending speed, optionally followed by a target words-per-minute figure. Less commonly heard than i…
QRS Send more slowlyส่งให้ช้าลงUsed to ask another operator to reduce CW sending speed — one of the most useful codes for a beginner CW operator to know, since…
QRT Stop sending / sign offหยุดส่ง / เลิกใช้งานสถานีFormally an instruction to stop transmitting. In everyday use, "going QRT" means an operator is signing off and shutting down the…
QRU Anything for me?มีอะไรสำหรับผมหรือไม่Used in traffic-net context to ask (or confirm) whether a station has messages to pass — closely related to QTC (how many message…
QRV Readyพร้อมใช้งานConfirms an operator or station is ready to proceed — to receive traffic, start a scheduled contact (a "sked"), or begin a net.
QRX Stand by / I will call you againรอสักครู่ / จะติดต่อกลับFormally used to schedule a specific call-back time/frequency. In casual amateur use it is often shortened to just mean "stand by…
QRZ Who is callingใครกำลังเรียกOne of the most iconic Q-codes in amateur radio: said right after finishing a contact to invite the next caller ("QRZ? this is HS…
QSA Signal strength (1-5 scale)ความแรงสัญญาณ (สเกล 1-5)Signal-strength-only report on a 1-5 scale (not the 1-9 scale used in RST's Strength digit or a calibrated S-meter reading) — his…
QSB Signal fadingสัญญาณจางหาย (เฟดดิ้ง)Describes a signal that varies in strength over time (propagation fading) rather than being interfered with or noisy — a distinct…
QSD Defective keyingการคีย์บกพร่องUsed to report a CW signal quality problem — keying that sounds sloppy, chirpy, or clicky rather than clean. A useful diagnostic…
QSK Full break-inเบรกอินแบบเต็มรูปแบบGave its name to "full break-in" (also written QSK) — CW operation where the receiver re-opens between individual dits and dahs,…
QSL Acknowledge / confirm receiptยืนยันการรับ / การ์ดยืนยันการติดต่อBeyond confirming that a message was received, "QSL" gave its name to the QSL card — a physical or electronic card exchanged betw…
QSO A contact / conversationการติดต่อสื่อสาร (บทสนทนา)The formal meaning is about relay capability, but in everyday amateur speech "QSO" has simply become the noun for a contact or co…
QSP Relay requestการขอถ่ายทอดข้อความUsed in formal traffic handling and nets when a station acts as a relay between two others who cannot hear each other directly.
QSV Send a series of V's (tuning)ส่งชุดตัวอักษร V (สัญญาณปรับจูน)A tuning/testing request — "V" (...-) is a traditional test transmission because it's easy to recognize and tune to, similar to t…
QSX Listening for ___ on another frequencyกำลังฟังสถานี ___ บนอีกความถี่หนึ่งCommon in split-frequency operation (typical in busy DX pileups): the calling station transmits on one frequency while listening…
QSY Change frequencyเปลี่ยนความถี่Extremely common in everyday repeater and simplex use: "let's QSY to 145.500" simply means moving the conversation to another cha…
QSZ Send each word/group more than onceส่งแต่ละคำ/กลุ่มมากกว่าหนึ่งครั้งRequests doubled (or repeated) transmission of each word, useful under weak-signal or marginal conditions — related in spirit to…
QTC Message(s) to send/receiveจำนวนข้อความที่จะส่ง/รับCore term in formal traffic handling (message-relay nets), and also well known from contests such as WAE, where "QTC" logs of rel…
QTH Locationที่ตั้งสถานีOne of the very first Q-codes every operator learns — almost always one of the first exchanges in a contact, alongside signal rep…
QTR Exact timeเวลาที่ถูกต้องUsed to ask for or state the exact time, most often in UTC — important for logging contacts accurately and for scheduled skeds/ne…