All the way back in 1978, when I was programming KOLO in Reno, I wanted to get away from backtimes and/or jocks who'd talk in the clear for too long trying to get to the NBC news at the top of the hour.
NBC did two feeds of the same newscast---at :54 and :00.
So I had engineering put an ITC cart recorder/player deck in the studio. It would record the :54 feed onto a five-and-a half minute cart. The newscast could then be played back anytime after :59:30.
My radio career, measured at the top of the hour:
Station 1 (part-time, late 1970s): Country music and agriculture. No national network. News at the top of hour, rip-and-read by the DJ from the UPI broadcast wire. Even so, we were expected to hit the top of the hour. Plenty of the old "instrumental to the top of the hour" trick. Everything live.
Station 2 (college, volunteer, late 1970s): Progressive rock. No network. Newscasts interspersed throughout the day at various times. Minimal expectations as to hitting precise times. However, there was a twist. The university, rather sprawling geographically, had an IBM system for synchronizing clocks by periodically sending tones through the electric lines. Guess what leaked into the station's audio? Especially through the phono preamps? So we had time tones anyway!
Station 3 (college, j-school, late 1970s): Classical/jazz/NPR. NPR didn't do hourly newscasts then and there wasn't a
Morning Edition yet. In non-NPR hours, the station produced its own newscasts as well as a newsmagazine 6-9 am. Yes, we basically did our own
Morning Edition. We were expected to hit the top of the hour, but there was always a dry read from the announcer before introducing the news. News was always live.
Station 4 (professional, early 1980s): Full-service AC, standalone AM (as I said elsewhere yesterday, the most endangered species in radio, though this one is still around as a cookie-cutter talker). ABC legacy affiliate. ABC-I newscasts at the top of the hour carried live, including the top-of-hour tone, usually with an adjacency or two sold. Local newscasts at :54 carried live. One of my part-timers once got the idea to pre-record the final newscast of the evening. Her production skills were excellent and I couldn't detect the pre-recording on the air. Nor did she tell me she was doing this. She was caught out one night when the tape broke. The station owner heard it and was very unhappy about it. Discussions ensued. She went back to doing the news live. Yet Paul Harvey's midday broadcast was always taped for rebroadcast. Some network features were taped; others weren't (for example, Howard Cosell was
never taped for some reason). Sports schedules could throw this schema out of whack and the latest ABC-I newscast might be tape delayed, but local news was always live.
Station 5 (professional but mediocre, mid-1980s): Full-service AC with CHR on the FM. AM had no network, with local newscasts at the top of every hour. We were expected to hit the precise time. Sometimes, the old instrumentals trick was hauled out. FM had "Mutual lifestyle" mornings only and brief local updates, with a limited degree of flexibility as to time. Station owner cared more about the AM than the FM, though I think they got more money off the FM.
Station 6 (professional, all-news, mid-1980s): This was KTRH Houston, which was all-news most of the time. It was a CBS affiliate in those days. Under my first ND, there was some flexibility in when the various programming elements arrived during the hour, but CBS news, with the top-of-hour tone, was always carried live. There were also hours with gardening shows (early morning remnant of legacy agriculture programming) and sports talk (latter part of PM drive), plus Larry King overnight. Then the News Director from Hell came in, ushering in a strict news wheel, positioned around traffic and weather on the 8's. The talk shows were pared back. I detest that guy to this day but I think those were the right moves for the station at the time. I don't know what the NDFH did to accomodate Astros baseball; I was out of the station by then. Under the first ND, after the end of an Astros day game, there would be a five-minute newscast featuring our best stories of the day, to showcase our work and to try to retain listeners from the game. That would take precedence over CBS news.
In this ensemble, no station generated its own time tone, though #2 inadvertently had one. Just imagine, say, a quiet segment of Yes's
Close to the Edge being interrupted by a high-pitched squeal. Fun times.