Retro: The Des Moines 1460, as KSO, used to be a nighttime go-to for me when I was in high school. They were top 40 fulltime , but then by 1965 they started flipping formats, but kept Dic Youngs top 40 show going from 7pm until midnight signoff. With the channel even less crowded than now, the signal was very listenable, and I liked the format, Every other record was an oldie. By 1966, KSO (Kay-so) threw in the towel on top 40 and "The Youngster" went on to a nearly 40-year run on KIOA....taking his personal oldies collection to Saturday nights.
KSO would eventually find much more ratings success in Des Moines during its country format from 1974-1989.