Until it begins regular programming on March 15, the Bay Area’s newest radio station — KTRB-AM 860 — is playing recordings of Bay Area radio personalities from the past. Voices we’ve heard so far include Dr. Don Rose, Al “Jazz Beaux” Collins, Van Amberg (on KFRC radio before his KGO-TV days), “Emperor” Gene Nelson, Tom Donahue and Alex Bennett. The recordings include jingles for stations and advertisers from the 1950s, 60s and 70s. The recordings are from the collection of Bay Area Radio Hall of Fame director David Jackson, who runs bayarearadio.org. The Merc’s Brad Kava has details of KTRB’s plans after it begins regular programming on March 15.