Not jazz related, but re: AM radio ... As a kid, I remember listening to Atlanta Braves games on WSB, a clear channel station, while visiting my grandparents in southwestern Pennsylvania, about 500 miles away (as the crow flies) from ATL.
Only at night. And you could only get good reception from high points around town. But that was something. Very memorable listening to those games while being so far from home. Announcers were Skip Caray (Harry's son), Pete Van Wieren, and Ernie Johnson.