okay so i just got my technician license about three weeks ago and ive been trying to get on some of the local FM repeaters in my area. i can hear people talking just fine but when i try to key up nobody seems to hear me, or at least nobody responds. i figured out that i probably need to program a CTCSS tone but honestly im still a little fuzzy on how the whole thing works.

from what i understand the tone is like a sub-audible signal that tells the repeater to open up and let you through? but my radio is a baofeng uv-5r and i kind of just guessed at some settings. i found the repeater listed on repeaterbook and it shows a 100.0 Hz tone but im not totally sure if that means i transmit with that tone or if its what the repeater sends to me or both. and then theres also the offset — the repeater is on 146.820 and i know i need a minus 600 khz offset but i dont know if ive set that right either.

also when i do finally get it working, whats the right way to join a conversation thats already going on? do i just wait for a pause and say my callsign or is there more to it than that? sorry if these are dumb questions i just dont want to be that guy who annoys everyone on the repeater lol

not dumb questions at all, everyone goes through this exact same thing when they start out. so the CTCSS tone — you need to set it as your transmit tone, meaning your radio sends it out when you key up. the repeater hears that tone and knows to open its squelch and retransmit you. some repeaters also send a tone back to you on their output so you can set your radio to only open when it hears that tone too, which helps cut down on interference from other signals, but that part is optional and not all repeaters do it.

for the baofeng specifically, you want to go into the channel settings and make sure the T-CTCS is set to 100.0 Hz. there should also be a separate R-CTCS setting for receive, you can leave that off for now or set it to the same tone if the repeater sends one back. and yeah the offset on 146.820 would be -600 kHz so your radio should be transmitting on 146.220.

as for joining a conversation, wait for a break between transmissions, key up briefly and just say your callsign. something like "KD9XYZ monitoring" and then wait to see if they acknowledge you. most repeater regulars are pretty welcoming, especially if they know youre new. some repeaters also have a net or round table going at certain times so check if theres a schedule posted anywhere for your local club.

oh man i remember being exactly where you are like two years ago, baofeng and all. one thing that tripped me up for a while was that i had the offset direction wrong — the uv-5r sometimes defaults to plus offset and you have to manually flip it to minus. so double check that because if youre transmitting on the wrong side nobody on the repeater is gonna hear you no matter what you do with the tone.

and honestly once you get it working dont stress too much about etiquette, just listen for a while and you'll get a feel for how people do things on that particular repeater. they all have their own little culture kind of. some are really chatty and informal, some are more structured. just give your callsign when you want to jump in and youll be fine.