ok so ive been listening to HF for a few weeks now with my new radio and i keep hearing people say things like QRM and QSB and writing QTH in their callsign info online. i know Q codes are a thing but i cant find a good explanation of like... when people actually USE them versus just knowing the definition. like is QRM just interference or is it specifically other stations interfering and does it matter which one you say. also saw someone write 73 at the end of a message and guessed it means goodbye or something but not sure. basically just trying to figure out how people actually talk on air because it sounds like a completely different language sometimes

yeah the Q codes can be a bit overwhelming at first but honestly you only need to know maybe a dozen of them to get by on most bands. QRM is specifically man-made interference, like another station bleeding onto your frequency or electrical noise from equipment, whereas QRN is natural static like from lightning. QSB is when the signal fades in and out which happens a lot on HF with skywave propagation. QTH just means your location, so "my QTH is Ohio" or whatever. and 73 isnt really a Q code, its just old telegraph shorthand for best regards and its used at the end of almost every contact. most people say it or type it just as a friendly sign-off. theres also 88 which means love and kisses and is usually sent between operators who know each other well or sometimes to a YL which means young lady, basically any female operator. the ones youll hear constantly on HF are probably QSL meaning acknowledge or confirm, QRZ meaning whos calling, and QSY which means change frequency. once you start actually making contacts it clicks pretty fast, just takes some listening time

oh man i remember being totally lost with this stuff too. one thing that helped me was realizing people use them two ways -- as a question and as a statement. like if someone says QRM? theyre asking if youre getting interference, but if they say QRM they're telling you there IS interference on the frequency. same with most of them. took me a while to figure that out just from context. also QRP means low power operation, like 5 watts or under, youll see that everywhere in groups and forums. people are real proud of making contacts with tiny rigs haha