Q Codes

A list of the more commonly used Q-Codes still around today.

QRL Busy (Stand by)
QRM Man made noise / adjacent channel interference
QRN Static noise
QRO Increase Power
QRP Reduce Power  (Or operating on low power such as under 10w)
QRT Shut Down / Clear
QRZ Who is calling me?
QSB Receiving poorly / Signal fading
QSL Confirmation (Often refers to confirmation cards exchanged by hams)
QSO Your over (Conversation - not to be confused with 'Over' used at the end of each transmission)
QSX Standing by on the other side.
QSY Move to another frequency
QTH Address / Location