What are Q-codes in ham radio?

Q-codes are three-letter brevity codes from early radiotelegraphy. Each code has a question form (asked with a question mark or rising inflection on phone) and a statement form (answer or report). On CW they compress common exchanges: location (QTH), signal report context (QRM/QRN), and contact confirmation (QSL).

What Q-codes appear in every CW QSO?

Most ragchews use QTH , QSL , and QSO (often in "TNX QSO"). QRZ when unsure who is calling. QRT when signing off. QRM and QRN when conditions are rough. QSY when moving frequency.

Are Q-codes the same as prosigns?

No. Q-codes are three-letter abbreviations spelled out with normal letter spacing. Prosigns (AR, SK, K) are sent as single unbroken characters. Both appear in the same QSO — see our prosigns guide .

How do I practice Q-codes for my first QSO?

Use the Morse code trainer QSO Simulator — it drills realistic exchanges with Q-codes and prosigns. Copy live CW on a WebSDR and write down every Q-code you hear. Our expanded Q-code blog post covers additional codes beyond this table.

Q-Codes Cheat Sheet: Ham Radio Morse Q Signals Reference

Q: Do I say the question or statement form on CW?

Context tells the other operator. QTH? or QTH HR? asks location; QTH BOSTON MA answers. QSL alone often means "I confirm" or "copy." When learning, listen for whether the sender expects a reply.

Q: What does QSL mean in Morse code?

QSL ( --.- ... .-.. ) means "I acknowledge receipt" or simply "confirmed." Operators also say "QSL card" for the postcard confirming a contact. QSL? asks "Did you copy?" QSL answers yes.

Quick Answer: What Are Q-Codes?

Q-codes are three-letter ham radio abbreviations — QTH (location), QSO (contact), QSL (confirm), QRM (interference), QRN (static) — each with a question form and a statement form. On CW they compress routine exchange data so operators copy faster. This page lists the fourteen Q-codes you will hear on HF every week, with Morse patterns and example usage in real QSOs.

Printable Q-code cheat sheet for ham radio CW operators including QTH, QSO, QSL, QRM and more — Q-code cheat sheet — download the JPEG master to print.

What is a Q-code?

A Q-code is a standardized three-letter brevity code from the early 20th century radiotelegraph service. The Q prefix marks it as a procedural abbreviation. On amateur CW, Q-codes are spelled with normal inter-letter spacing — unlike prosigns, which run together as one character.

Essential Q-Codes for CW Morse

Code	Morse	Question Form	Statement Form	On-Air Example
QTH	`--.- - ....`	What is your location?	My location is …	QTH HARTFORD CT
QSO	`--.- ... ---`	Can you communicate with … direct?	I can communicate with … direct.	TNX QSO OM
QSL	`--.- ... .-..`	Can you acknowledge receipt?	I acknowledge receipt.	QSL VIA BURO
QRM	`--.- .-. --`	Are you being interfered with?	I am being interfered with.	QRM FROM PLSD
QRN	`--.- .-. -.`	Are you troubled by static?	I am troubled by static.	QRN BAD TONITE
QRP	`--.- .-. .--.`	Shall I decrease power?	Decrease power (low power op).	QRP 5W TO DP
QRT	`--.- .-. -`	Shall I stop sending?	Stop sending / closing down.	MUST QRT NOW
QSY	`--.- ... -.--`	Shall I change frequency?	Change frequency to …	QSY 14074
QRZ	`--.- .-. --..`	Who is calling me?	You are being called by …	QRZ? (after partial call heard)
QRX	`--.- .-. -..-`	Shall I standby?	Standby / please wait.	QRX 2 MIN
QSB	`--.- ... -...`	Are my signals fading?	Your signals are fading.	QSB QSB
QRV	`--.- .-. ...-`	Are you ready?	I am ready.	QRV? B4 NET
QRS	`--.- .-. ...`	Shall I send more slowly?	Send more slowly.	PSE QRS
QRQ	`--.- .-. --.-`	Shall I send faster?	Send faster.	QRQ FER DX

How Q-Codes Appear in CW QSOs

Q-codes sit inside ordinary message text, separated by prosigns and standard words. Here is a typical exchange annotated:

Station A: STATION B DE MORSECODER KN

Station B: MORSECODER DE STATION B FB UR RST 579 QSB QSB BT QTH PRACTICE LAB AR MORSECODER DE STATION B KN

Station A: STATION B DE MORSECODER QSL QSL BT QTH TRAINER DESK BT NAME OP AR STATION B DE MORSECODER KN

QSB QSB — "you are fading" (statement, repeated for emphasis)
QTH SPRINGFIELD MA — location answer without needing "QTH?" first
QSL QSL — "copy confirmed" on the report
BT — prosign separating report from name/QTH (see prosigns)

Question vs Statement: Reading Context

On phone, operators raise their voice at the end of a question. On CW, context and trailing punctuation carry the meaning:

Asking (question form)

QTH? — What is your location?
QSL? — Did you copy my report?
QRZ? — Who is calling?
QRV? — Are you ready?
PSE QRS — Please send slower

Answering (statement form)

QTH DENVER CO — My location is Denver
QSL — Roger / confirmed
QRN BAD — Heavy static here
QRT — Closing station now
QSY 14060 — Moving to 14.060 MHz

QRM vs QRN vs QSB

Three codes newcomers confuse — they describe different problems:

Code	Problem	Typical Cause
QRM	Man-made interference	Nearby stations, electronics, power-line noise
QRN	Natural static	Lightning, atmospheric noise, solar conditions
QSB	Signal fading	Multipath, ionospheric changes — signal strength varies

Want more codes? Read our expanded Q-code cheat sheet blog post for traffic-handling and maritime entries.

Q-Codes — Frequently Asked Questions

Context tells the other operator. QTH? or QTH HR? asks location; QTH BOSTON MA answers. QSL alone often means "I confirm" or "copy." When learning, listen for whether the sender expects a reply.

QSL (--.- ... .-..) means "I acknowledge receipt" or simply "confirmed." Operators also say "QSL card" for the postcard confirming a contact. QSL? asks "Did you copy?" QSL answers yes.

Ham Radio Q-Codes Cheat Sheet