Thanks to collector Gary Pfeifer, I now have a brief tape (on CD) of Ron Wortham on the air at KCAC on New Years Eve 1969! It's short but sweet, most of the music is edited out (just fragments of Creedence and Led Zep), but there's about 8 minutes worth of talk and commercials. Ron mentions how cold it was that morning at his "house in the country" (Starbrite) and that his car was iced over and "Bill's car broke down." There are also commercials for Wallich's Music City and for a New Years Eve show that night with Waylon Jennings at JD's.
On the same disc is - get this - a brief recording of KCAC in 1963, when it was an R&B station! Only about 6 minutes long but it contains a mix of DJ chatter, commercials (including one for an upcoming show by James Brown), and music (one complete song by Jimmy Reed). The date is November 21, 1963, the day before a somewhat more ominous event.
The disc also contains a non-KCAC aircheck, again from December 31 1969, of Phoenix Top-40 station KRIZ. This aircheck runs 32 minutes and the DJ is Mark James. It seems to be intact and unedited - i.e., music, commercials, everything that aired during that 32 minutes. Music ranges from Zeppelin to "Gimme Shelter" to whatever else was in the Top 40 at that time.
Quality of the tapes is variable (and mostly pretty hissy) but they are all perfectly listenable. Don't ask me who recorded them, or why, or anything else - this information doesn't tend to travel much in the community of aircheck aficionados, where the recording itself is the object of interest, and it passes through many hands and much copying along the way. The important thing is that the tape has been added to the growing KCAC archives!!!