I was in Tennessee last night and caught a show on the Memphis PBS TV station narrated by Garrison Keilor about the early history of WLS in the pre-top 40 days. The program was focused on the 34-year run of the "National Barn Dance", which was a very serious competitor to WSM's "Grand Ole Opry".
Great stuff, and I highly recommend watching for it on your local PBS station. It was produced by WTTW in Chicago, so it may have already aired there and/or other markets. But for whatever reason, I wasn't aware of it, and I came across it for the first time last night. Very well done, and a great illustration of the power of the original class 1-A clear channel stations.
WLS' days as a top-40 powerhouse was actually "Act 2" of what the station was able to accomplish at night.
Great info, WLS barn dance, Red Blanchard, Ray King, Beaver Valley Sweethearts, Little Genevieve, Bob Atcher & others. Wasn't it from the 8th St Theater off of S. Michigan?