just a comment about CB range... in the late 70s I had a relatively modest CB base station.. it was a Cobra 21 mobile transceiver, powered by a Radio Shack 12vdc regulated power supply... the key part of the system as commented was the antenna... it was a 1/2 wave Shakespeare "Big Stick) length adjusted to give very close to a 1:1 SWR... it was mounted on a 20' mast and grounded with a 4'copper ground rod... on flat coastal Florida I could get 12mile reliable to a similarly equipped base station, and about 4miles to a mobile unit with a Cobra 21 and 1/4 wave stainless whip, bumper mounted...

about 2 miles reliable communication between our similarly powered autos... I had a 1/4 base load magnetic mount in the center of the roof to the 1/4 wave stainless whip

today, with side band available, the range should be somewhat improved... regards