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Codul Q
The Q-code was originally instituted at the Radiotelegraph Convention held in London, 1912. The Q-codes then grew over the years and decades.
The following list of current Q-codes is compiled from various sources.
The QAA...QNZ        series are reserved for the aeronautical service. (ICAO Procedures for Air Navigation Services (PANS), Abbreviations and Codes [Doc8400])
The QOA...QQZ         series are reserved for the maritime services. (ITU RR1990, Appendix 14)
The QRA...QUZ        series are for use by all services. (ITU RR1990, Appendix 13, 14)
The QZA...QZZ         series for other usage.
QRG
 What is my frequency in kHz ?
Your frequency is ....
QRH
Does my frequency vary ?
Your frequency varies
QRI
How is tone of my transmission
Tone of your transmission is ...
QRL
Are you busy ?
I am busy
QRM
Are you being interfered by other stations?
I am being interfered by other stations
QRN
Are you being interfered by static noise ?
I am being interfered by static noise
QRO
Should I increase transmission power ?
Increase transmission power.
QRP
Should I decrease transmission power ?
Decrease transmission power.
QRQ
Should I send faster ?
Send faster
QRS
Should I send slower ?
Send slower
QRT
Should I stop transmission ?
Stop transmission.
QRU
Have you anything for me ?
I have nothing for you.
QRV
Are you ready ?
I am ready
QRX
When will you call me again ?
Standby, I will call again at...
QRZ
Who is calling me ?
You are being called by ...
QSA
What is the strength of my signal ?
Strength of your signal is ( 1 to 5 )
QSB
Does the strength of my signal vary ?
Your signals are varying
QSD
Is my sending bad ?
Your sending is bad
QSL
Can you acknowledge the receipt ?
I am acknowledging the receipt.
QSO
Can you communicate with...?
I can communicate with ...
QSP
Can you relay message to...?
I will relay message to ...
QSV
Should I send series of V's ?
I shall send series of V's
QSX
Will your listen for ...on ....kHz ?
I am listening for ... on ....kHz
QSY
Shall I change the frequency ?
I am changing the frequency
QTH
What is your location ?
My location is ...
QTR
What is the exact time
Exact time is ...
yo2bzv, 19.04.2004