And they were in a huge market, St. Louis, but were for fairly lousy facilities. Still, one of those, 1380, was the legendary KWK which was a huge Top 40 outlet maybe 60 years ago.
KWK is...complicated. The facilities before 1973 were actually fairly decent. The year before, my family moved to St. Charles County, which became the far-flung northwestern suburbs of St. Louis. I could pick the station up at night, at the time with a soul format. Then it went off the air and stayed silent for five years due to bankruptcy and various legal machinations that resulted. When it came back under Doubleday ownership in 1978, it was with inferior facilities, a two-site operation, with a mediocre signal in St. Charles County during the day and none at all at night. I mention St. Charles County precisely because that's where the growth in the St. Louis area happened. I lived and went to high school in O'Fallon, which had 7,000 people during my time in high school. Now it has more than 95,000.
KWK had some mild success when it first signed back on but Doubleday quickly saw the writing on the wall and bought WGNU-FM from Chuck Norman. That FM (106.5) became WWWK and later KWK-FM after Doubleday won a court case to get the rules on K vs. W calls relaxed. While KWK started out as a Top-40 station, the KWK/WWWK format became a tightly-formatted AOR that gave KSHE a run for its money. But KSHE outlasted everyone.
The other facility that was up for auction was the old WIL, an early Top 40 station and later a legendary country station whose call letters still live on in the FM band. But it also had coverage problems, especially in the western suburbs.
St. Louis is in some ways an exceptional case. The gigantic success of KMOX...no doubt about it, it was an awesome radio station...covered up the fact that every other AM station in the market struggled in one way or another.
KXOK was the dominant Top-40 station until Bartell's KSLQ came on in the fall of 1972. Within weeks, no one at Fort Zumwalt High was talking about KXOK any more. It was all about KSLQ and, to a lesser extent, album-rock KADI - for, once the notion of tuning to FM for something other than background music took hold, and it took hold fast, some of us sampled what else was out there.
In many ways, the constant in radio is change. KSLQ, KADI, KXOK, KWK-FM are all something else now. KMOX and KSHE are not the same stations they were, even if they are still successful.
Aside from that, I can't believe the energy that has gone into this thread.