I would be interested in both my friend Mike and my occasional sparring partner TheBigA sharing their opinions as to why KNX-FM dropped so precipitously.
I was still listening during that period, when I wasn't on the air somewhere myself, and I do not remember any significant changes in the programming that would have driven the audience elsewhere.
At the beginning of '81, I switched from programming and jocking to news, along with a $14,000 pay cut. So between a bit of belt tightening and no longer needing to schmooze with record promotion folks, I only made one visit to L.A. that year, for a week in June.
I couldn't tell you whether I listened to KNX-FM or not. I must have, but I didn't settle into it.
I remember overall thinking L.A. radio sounded pretty sleepy apart from KLOS and KMET.
I probably, because I could, spent most of the time listening to KFMB-AM from San Diego, as they were closest to what we were doing in Reno and I could pay attention to their news style.
--------------------------------------
Let's try to get some perspective.
So, the winter '81 book (January-February) was their peak, they lost a point and a half in April-May (4.3-2.8) and never really recovered.
Looking back, KNX-FM had definite peaks and valleys---after their fall '76 peak of a 3.8, the trend was 3.6-3.2-3.4-3.6.
But '78 was a rough year---2.7-2.6-3.1-3.2 (fighting back to their worst number of the year before).
And '79 was grim---2.2-2.2-2.8-2.7.
1980 was the turnaround---3.0-3.2-3.2-but back to a 2.8 for fall '80.
And that makes the 4.3 in winter '81 look very much like a fluke....
Crap.
So, all this is coming from the R&R ratings directories at worldradiohistory-dot-com, and KNX-FM's big book would be a typical book for KNX-AM and vice versa.
@Huff , could you please check the databases for both KNX-FM's
and KNX (AM)'s 12+ share for Winter 1981?
I'm betting R&R just flipped the AM and FM...which would mean that my original recollection that KNX-FM peaked in fall of '76 was accurate.
It would also mean that they really only did okay with the transition from Laurel Canyon early 70s to slick late 70s and that the drop off wasn't a cliff after all but just the last of the air leaking out of the balloon.