"93 KHJ!"
I hereby declare that I am old enough to have listened to "93 KHJ" in Los Angeles in 1969, just like Rick Dalton and Cliff Booth do.
So "Once Upon a Time ...in Hollywood" has great memories for me. Evidently, some people "back in the day" made audio tapes off of KHJ broadcasts and they were available for QT to use in 2019 for his movie.
In my case, I wasn't old enough to drive when I first started listening to KHJ radio. I listened to it in my bedroom, in the backyard(with friends) and occasionally...on the roof of my parents house(also with friends.) If you spent a day listening to KHJ, you'd listen to an hour of the same songs counting down to "Number One" at the end of the hour and then the playlist would start all over again. I recall songs like "Penny Lane," "Light My Fire," certain songs by the Monkees, certain songs by The Mamas and the Papas, and certain songs by Paul Revere and the Raiders as the kind of hits that kept playing over and over and over.
"Once Upon a Time in Hollywood" also captures the airtime BETWEEN songs...the commercials(for the movie of The Illustrated Man, for Mug Old-Fashioned Root Beer; for a "Batman TV show" promotion), the weather reports..even news about the Vietnam War.
I lived in LA. I listened to 93 KHJ all the time(eventually, yes, as a driver in my car in the 70's -- I can't recall when the channel ended as a rock station, though. The late 70s? The 80s?)
Anybody else with those memories?
PS. The other big LA radio station at the time was KRLA...I can't remember the call numbers. But at the end of every hour, they would have a male/female chorus come on and sing the jingle: "K R L A...Number One Most Requested So--oo-oo--ng!" And then they would play the song.
PPS. KHJ and KRLA were AM stations. Came the 70's, we got FM stations with a much more rich sound("No static at all," as Steely Dan sang.) I think K-EARTH came into being then.