Hey all, so ive been licensed for about 3 months now (Tech) and ive been listening to a couple local repeaters but honestly im still pretty confused about how the whole thing works in practice. I understand the basics - input and output frequencies, offset, all that - but the CTCSS tone stuff is where i start to lose the thread.

Like I understand its a subaudible tone you transmit to open the repeater but what i dont totally get is do you need to also have tone squelch set on your radio to only hear traffic that has the tone, or is that separate? My HT is a Baofeng and I set the transmit tone to what the repeater directory says but im not sure if i should also set the receive side to the same tone or leave it open.

Also kind of a separate question but what is the etiquette for just... jumping into a conversation that's already going? I heard two guys ragchewing the other night and wanted to say hi but wasnt sure if you just key up between overs or if thats rude. Feels weird to interrupt but also the repeater sits quiet for like 10 minutes sometimes and it seems like a waste not to use it.

Good questions and dont worry, everyone's confused about this stuff at first. So the CTCSS thing - you've got it half right. The tone you transmit is what tells the repeater controller to open up, yeah. Whether you set your receive side to decode that same tone (sometimes called tone squelch or CTCSS squelch) is really just a personal preference thing. If you set receive tone squelch, your radio will stay quiet unless it hears that tone, which cuts down on hearing noise or other signals that bleed through. Some people like it, some dont bother. Either way the repeater doesn't care what your receive is set to, it only cares about your transmit tone.

As for jumping in - totally fine and honestly encouraged. When there's a gap between transmissions, just key up and say something like your callsign and that you're monitoring or wanted to say hi. Most guys on repeaters are happy to have someone new join in. Just wait for a pause, dont step on someone mid-sentence, and you're good. The pause between overs is exactly when you do it.

yeah what he said about the tones is right. I was in the same boat when i started and spent way too long thinking i was doing something wrong because i had receive tone squelch on and kept missing the first half second of audio when someone keyed up. ended up just turning the receive tone decode off and leaving it open so i hear everything. works fine.

the etiquette thing honestly just depends on the repeater and the group, some repeaters have pretty established nets or regular guys who kind of own the thing informally lol, but most places around here at least will welcome you jumping in. worst case they finish their QSO and then you can say hi after. you wont get yelled at for trying