MARC Advanced Topics 14 January 2021 – Q-codes and Prosigns Posted on January 14, 2021January 14, 2021 by Jan (KD7ZWV) Presentation: Q-codes_and_Prosigns References and Links FSD-218: ARRL QN Signals for CW Net Use Communicating with Other Hams Amateur Radio Q-Code The international Q-code Prosigns, Q Signals and CW Abbreviations Used in Amateur (Ham) Radio Prosigns Q-Signals & Prosigns Posted in Uncategorized.