I’m really not sure why I went looking for this, but this is my first ever mention in the ‘trades.’ This article was from the February 28, 1970 issue of Billboard. WMUM was my first fulltime job in broadcasting!
The article (sorry that’s as large as it gets) mentions the Knight Quality Stations. As it turns out many weren’t on at night and most had little relationship with quality.
Damn, that’s a long time ago!