This neat aircheck was just shared with me. Unfortunately, it is pretty short but we can hear a very different sounding KZFM back in 1975. The aircheck starts with an ad for a department store in downtown Corpus which I think closed more than 20 years ago. We also hear promotions for news programming on the station. No songs included however. I think KZFM was top 40 back then. Perhaps others were around CC at that time and can provide more info. Rather unbelievably the aircheck was taped on a DX night from Wisconsin.
http://www.youtube.com/watch?v=SvIXMiDhNhw
http://www.mostlyuppermidwestairchecks.com/southern-airchecks.html
http://www.youtube.com/watch?v=SvIXMiDhNhw
http://www.mostlyuppermidwestairchecks.com/southern-airchecks.html