ok so i passed my general a few months ago and ive been mostly just listening on 40m trying to figure out where to jump in. i keep seeing people talking about band edges and not operating too close to them but i dont really understand what that means practically. like is it about the carrier frequency or the actual signal bandwidth or what

and also the ARRL band plan vs the actual FCC allocations seem different sometimes? or am i reading it wrong. someone at my local club said something about how generals cant go below 7.175 on phone but then i heard guys calling cq way down around 7.150 and they sounded american to me. just trying to figure out where i can actually key up without stepping on someone or going out of my priv

yeah this trips up a lot of new generals. the FCC part 97 is what actually matters legally — the ARRL band plan is just a gentlemens agreement, nobody enforces it. for 40m phone as a general you can operate from 7.175 to 7.300 MHz, and that 7.175 is your lower edge. now here's the part people mess up — that frequency is where your carrier needs to be, but your signal on SSB extends downward from the carrier on LSB. so if you're on 7.175 you're probably putting energy down around 7.172 or so which is technically outside your priv.

most experienced ops will tell you to stay at least 3 khz above your lower limit just to be safe, so call it 7.178 and you're fine. the guys you heard on 7.150 might be extra class, or they might be DX stations — foreign hams have different allocations and the 7.100 to 7.200 range is actually shared with international broadcast in some regions which is a whole other mess. you're not imagining it, it gets complicated down there.

also just to add — dont stress too much about the band plan stuff when you're starting out, like obviously dont intentionally go outside your allocation but the band plan stuff like where cw ends and phone begins, or where digital is supposed to live, thats all just convention. you'll see people ignoring it all the time espcially on weekends during contests when everything gets chaotic anyway