Thanks for the update, I didn't realize you added so many airchecks to your site. I liked listening to all the nightly signoffs, everything sounded so official.
My favorite aircheck was the WTMJ-FM to WKTI format change. It was refreshing to hear such a serious sounding, well thought out announcement. So different than the silly stunts we get today when stations flip formats.
I also enjoyed the 1976 WKTI airchecks. I listened to I-94 a lot that year and it brought back good memories. Actually at the time I thought they were quite a boring station because of the automation. But my dad liked the station so I ended up listening too. He had to be one of the only WTMJ-FM listeners who stayed loyal to the frequency after the format change.
Doobie Brothers-Taking It To The Streets was on that aircheck,I totally remember how often they played that song. If that aircheck was recorded a couple weeks latter I guarantee Starland Vocal Band-Afternoon Delight would have been on there. That was by far the song WKTI played the most in the Summer of '76. I also liked hearing the Great Lakes Dragaway commercial, They had to be the #1 local radio sponsor at the time, at least on younger leaning stations.
On the 1983 WAPL aircheck you can hear David Lee voicing a spot. He would latter go on to work at WQFM. He has such a cool voice. For the last several years I have heard him on on Westwood One NFL football broadcasts...voicing the imaging.