FIRST OFF . . .

KLSX-FM morning deejay Peter Tilden, whose 6-10 a.m. show was floundering in the ratings, has been fired and former KMET jock David Perry will take over his duties on Monday. . He will be joined by Kate Hayes, who had been on the show with Tilden. KLSX General Manager Bob Moore said Thursday that Tilden was “miscast� in the morning slot. “I believe he’s a very talented and creative individual but all of our research and obviously the Arbitrons (ratings) said our audience wanted a music-intensive and music-oriented person in the mornings,� Moore said. “Our particular people didn’t want that type of talky morning show. I think in the right environment he would have been very successful. But, we had to listen to our audience. . . . It was a critic’s hit and an audience failure.� Moore also pointed to the increasingly tough competition locally among morning drive-time air personalities. Arbitron ratings for the spring quarter released this week showed that the station had plummeted in the ratings since Tilden started in September. The station had ranked ninth last fall and dropped to 21st in the last survey. Perry, who had worked most recently at KLSX’s sister station in Detroit (WCSX) and at KMET from 1974-80, will feature more music and less talk, Moore said, a familiar rallying cry in Los Angeles radio these days.