Mapleham Study — Chapter 2

Chapter 2 — Key Takeaways

Q-Codes — QRM (interference), QRN (static), QRS (send slower), QSL (confirm), QRZ (who calls?), QSY (change freq), QTH (location)
Repeater Summary — FM mode, plus-minus 600 kHz offset (2 m), CTCSS tones (100 Hz / 67 Hz), time-out timer (about 3 min)
HF Voice Bands — LSB for 160/80/40 m; USB for 20/15/10 m; CW works on all bands
Calling CQ — voice: say "CQ CQ CQ this is [call]" three times; CW: "CQ CQ CQ DE [call] [call] [call]"
RST Reports and QSL Cards — Readability 1-5, Strength 1-9, Tone 1-9 (CW only); QSL and LoTW confirm contacts
Digital Modes and Station Equipment — TNC for packet, soundcard for FT8/FT4, and essential accessories
UTC and Nets — all logs in UTC; CHU time service; Net Control Station manages scheduled nets
Emergency Summary — MAYDAY/SOS highest priority; Break break for repeater emergency; Pan-Pan (urgency), Securite (safety)