When television first barged so rudely onto the U.S. entertainment scene, many radio stations flipped the keys shut on their studio mikes, set their turntables to twirling eternally, hired the disk jockey to titillate the teen-ager with pointless prattle. But there are notable signs that the clatter of the platter is gradually being muted. Its replacement: serious chatter.
A pioneer trend setter has been KMOX, CBS's St. Louis station, whose 50 kw., clear channel signal sweeps the plains and burrows into the valleys of a large part of mid-America. Last year General Manager Robert Hyland, fed up with 24 hours...