At the time this aircheck was recorded, KWTO-AM was the big station in southwest Missouri. Nobody else came close. The format was Country and their jocks were top-notch. Even people who didn’t particularly like country (such as your author who was only 18 at the time) would listen because of KWTO’s quality presentation. At my location in Apple Valley, Minnesota, 560Khz was dominated at night by KWTO and WIND/Chicago. I could separate the stations pretty well by selecting from multiple horizontal long wire antennas. You can hear another station mixing in the background, which I believe is WIND.
This broadcast was received using a Pioneer SX-3900 receiver. It was recorded with a Technics stereo cassette deck onto Scotch Dynarange tape.