Bonneville International, which just regained ownership of KIRO Radio last year, will switch KIRO-AM to all sports talk next April. KIRO-AM’s news and news-talk fare will move exclusively to 97.3 FM.

Thus will end more than 35 years of what was successively billed as “KIRO Newsradio 7,” then “KIRO Newsradio 71,” then “710 KIRO.” (Each more precise frequency reference responded to the prevalence of more precise tuning displays on car radios.)

KIRO-AM is one of the city’s oldest stations. It goes back to the Old Time Radio golden age, during which it amassed a larger collection of CBS Radio network recordings than CBS itself had (a collection of phonograph records that’s now owned by the UW). It eased into a middle-of-the-road music and news format by the early 1960s.

In the early 1970s, Bonneville spent its way to the top of the local ratings by ditching the DJs (except on weekends) and hiring a full news reporting staff.

I heard Nixon’s resignation speech on KIRO. I heard the start of the first Gulf War on KIRO. The voices of Bill Yeend, Dave Ross, Jim French, the late Wayne Cody, et al. are permanently etched in my brain’s ROM.

It was weird, on Election Night, to bring a cheap, FM-only portable radio to my temp office site and try to listen (during a dinner break) to NPR’s blathering “analysis” of returns that hadn’t come in yet. KIRO had already begun simulcasting its news-talk on FM, but I couldn’t pull in that signal from where I was.

But that’s one reason why they’re doing this. The public now associates AM talk with looney right-wing demagogues. FM is now where the targeted demographic audience segments go for everything except sports (with a few notable exceptions such as KIXI and KPTK).