Have posted several WJPC/WLNR airchecks from the late 80s/early 90s. This was the "Soft touch", quiet storm era, with the all-female airstaff, when the stations were owned by the Johnson Publishing Company.
http://www.youtube.com/watch?v=Fphxla443cM
http://www.youtube.com/watch?v=fySFpoIKQvY
http://www.youtube.com/watch?v=aLSiD__3fkQ
http://www.youtube.com/watch?v=qUoXEXe8Q9g
http://www.youtube.com/watch?v=lLA1d88ozNg
http://www.youtube.com/watch?v=2qtReUGvbb8
http://www.youtube.com/watch?v=Hjw3efiJXX8
http://www.mostlyuppermidwestairchecks.com/chicago-il-airchecks.html
http://www.youtube.com/watch?v=Fphxla443cM
http://www.youtube.com/watch?v=fySFpoIKQvY
http://www.youtube.com/watch?v=aLSiD__3fkQ
http://www.youtube.com/watch?v=qUoXEXe8Q9g
http://www.youtube.com/watch?v=lLA1d88ozNg
http://www.youtube.com/watch?v=2qtReUGvbb8
http://www.youtube.com/watch?v=Hjw3efiJXX8
http://www.mostlyuppermidwestairchecks.com/chicago-il-airchecks.html