That explains why I've ever only heard one voice on the radio station outside of the syndicated shows.
Funny thing about Redding (and I know this is off this specific topic but I'm going in anyway). The first time I visited there was at the tail end of December, 1979, just after Christmas. We spent the night there in our 1973 Dodge truck with a camper in the back. I had my Panasonic RF-2600 receiver with me and I was definitely taking radio notes. There were five AM outlets, two of which (540 and 1330) signed off at night. Two of the remaining three were strictly top 40 (600 and 1230), and the third station (1400) was basically ac with oldies (that was my favorite station in town).
The FM band had only one licensed station at the time, KVIP (I think the callsign was the same back then as it is now), the religious outlet at 98.1 mHz. The only top 40 FM station in the area was the Red Bluff station licensed at 95.7 and that was definitely automated.
When I visited the city in 2000, everything had changed. 540 was on nights and was (mostly) simulcasting KVIP-FM, which was the only station with the same format as it had in late 1979. 1230 was satellite nostalgia (WW1, if I remember correctly), 1400 was conservative talk, a new 1670 (replacing the 600) was carrying sports, and both 600 and 1330 were no more.
The FM, which had but one station in late December of 1979, was crammed with both full-power stations and translators by the time I returned in 2000. And since then, per Internet sources, both the AM and FM bands have had additional occupants. And Redding is *still* not really that large of a town, making
@SomeRadioGuy's comments quite accurate.