MESA, Ariz. — The A’s newest broadcast schedule will, for the first time, include no Bay Area radio station.

Oakland is moving all of its audio content to TuneIn, a free app available on mobile devices and PCs that also streamed the A’s games last year. But the broadcast plan announced Tuesday morning includes no terrestrial station in the Oakland/San Francisco region.

The reaction from many fans to Tuesday’s news ranged from disappointment to outrage.

“I love listening to the boys on the radio,” Carlos Soria, 52, said at the A’s Fitch Park complex. “And I’m also concerned about a lot of older folks. I’m in the booster club, and there are a lot of older fans who still bring terrestrial radios to the game. It’s going to be difficult for them.”

The closest major station in the team’s radio network will be KHTK (1140 AM) in Sacramento. Even in 1978, when Oakland was about to go into the regular season with no radio station in place, Cal’s student station, KALX, served as the broadcast home for more than a month.

“We’re excited,” A’s President Dave Kaval said of the move to an entirely streaming platform in the Bay Area. “We’re trying to be innovative, we’re trying to be responsive to fans and trying to attract younger fans.”

More Information A’s radio affiliates KAHI 104.5 FM/950 AM Auburn KATA 1340 AM Eureka KBLF 1490 AM Red Bluff KDAC 1230 AM Fort Bragg KESP 970 AM Modesto KFPT 790 AM Fresno KHTK 1140 AM Sacramento KMYC 1410 AM Marysville KNRO 1400 AM/103.9 FM Redding KPOD 1240 AM/106.7 FM Crescent City KRKC 1490 AM King City KXBX 1270 AM Lakeport KUKI 1400 AM/103.3 FM Ukiah Spanish language KIQI 1010 AM San Francisco** KATD 990 AM Pittsburg/Antioch**

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The A’s also were on the TuneIn app last year, along with local station KTRB (860 AM), a conservative talk-show station that drew numerous complaints from fans for its non-baseball programming. The team did talk with local outlets about coverage this season, but finding stations with a strong-enough signal willing to air 162 games, many during drive time, has long proved to be difficult. The A’s efforts to buy a station in past years didn’t come to fruition, and they were happy with their initial TuneIn experience.

“I always think we’re being responsive to fans’ concerns about our different partners,” Kaval said without being specific. “We’re really always trying to put together the best possible package and take in all the input we get. But the primary drive was the accessibility and the expanded digital content available on the TuneIn app, including A’s Cast.”

There was some trepidation, particularly among older fans, about an all-digital audio platform last year when Oakland became the first major-league team to stream its games free as part of its broadcast plan (as opposed to games available on MLB’s app, which is not free).

“People like me, it’s easy to stream,” said Chris Walton, 43, who is from Oakland but now lives in Tempe. “Every time I get in the car, I link my Bluetooth to the stereo. But my mom, Linda, lives in Oakland and she has no idea how to do that. I’d have to get her phone set up and every time she gets into the car, she’d have to get it set up, and I can’t see that being easy for her.”

Minutes after Walton finished speaking to a reporter, he received a text from his mother, Linda, saying she was in the midst of firing off an angry message to Kaval about the decision.

Kaval said that the team believes fans are now educated about the streaming service and noted that the vast majority of the audience owns mobile devices or laptops. The feedback the A’s got back about TuneIn last year, Kaval said, “is that it’s a big win.”

Several fans asked Kaval on social media about having a low-wattage stadium-only radio broadcast for real-time coverage, but such broadcasts are no longer allowed because they interfere with other cellular service in stadiums. The A’s anticipate only a slight delay between their streaming broadcasts and the game action, depending on the Wi-Fi and cellular conditions.

A’s Cast’s daily programming includes pre- and postgame shows, interviews, game replays, podcasts and talk shows, and Kaval said the team will continue to roll out new content. The A’s left 95.7 FM after the 2018 season in part because they thought there was not enough additional A’s content on the station.

All of Oakland’s spring training games will stream on TuneIn, and once a homestand during the regular season, the team will offer a commercial-free broadcast. Ken Korach returns for his 25th season on A’s broadcasts. Vince Cotroneo is back for his 15th year and Ray Fosse will make occasional appearances.

In a welcome development, the A’s Spanish-language broadcasts on TuneIn will expand to include every regular-season home game; the broadcasts on Fridays, Saturdays and Sundays also will air on KIQI (1010 AM, San Francisco) and KATD (990 AM, Pittsburg). Amaury Pi-González returns for his 27th season with the A’s and Manolo Hernández-Douen for his 12th.

Fosse will continue his work on the A’s telecasts on NBC Sports California; that schedule has not yet been announced, but all 162 regular-season games are expected to be aired, with select games on MLB Network.

Fans out of the market cannot listen to free live streams of the team’s games, but on-demand content such as podcasts are available outside of the A’s region. Fans outside of the market can listen to all games on TuneIn’s Premium service, which is not free, or can listen on the MLB app or Sirius XM, other services that charge a fee.

Susan Slusser is a San Francisco Chronicle staff writer. Email: sslusser@sfchronicle.com Twitter: @susanslusser