ok so i just upgraded to general last month and im trying to figure out where i can actually transmit on 40 meters. ive been reading the band plan stuff but honestly its kind of confusing because theres the FCC allocation and then theres like the "recommended" segments and they dont always match up perfectly?

like i know phone starts somewhere around 7.175 or 7.2 but ive heard people say you should stay away from the edges and i dont really understand why. is it a legal thing or just a courtesy thing. and what even happens if you operate right at the band edge, is that actually illegal or just frowned upon

also heard something about 40m being different in other parts of the world which is making this even more confusing for me

yeah the ITU region stuff trips up a lot of people. so in region 2 (thats us, north and south america) 40m goes from 7.000 to 7.300 MHz for amateurs. your general phone privileges start at 7.175 and go up to 7.300. the reason people say stay away from the band edge is basically because your radio isnt perfect -- if youre transmitting on 7.300 your signal has sidebands and carrier artifacts that can bleed above 7.300 which is outside the amateur allocation. so its not necessarily that 7.300 itself is illegal to use, its that its really hard to guarantee your actual transmitted energy stays within the band when youre right at the edge. most people just stay a few kHz inside to be safe. its partly legal and partly just good practice.

in region 1 (europe mostly) 40m only goes to 7.200 which is why sometimes you hear DX stations down there that seem to be in your phone segment but actually arent in theirs. leads to some weird situations on the band.

i was in the same boat when i upgraded. honestly just download the ARRL band plan chart and tape it next to your radio, that helped me way more than trying to read the actual FCC part 97 language. the FCC rules and the band plan arent the same thing but the ARRL chart kind of combines both in a way thats easier to read. the legal limits are what matter for not getting in trouble but the gentlemens agreement stuff about like CW at the bottom and digital modes in certain spots is just how things work in practice