WKVB (107.3 FM) is a non-commercial radio station licensed to serve Westborough, Massachusetts, United States, carrying a contemporary Christian format known as "K-Love". Owned by the Educational Media Foundation, WKVB does not broadcast any local programming but functions as Greater Boston's network affiliate for K-Love, despite being located in the adjacent Worcester market. The station's studios are located in Boston's Allston district, while its transmitter is on Stiles Hill in Boylston, with a backup in Paxton. In addition to a standard analog transmission, WKVB broadcasts in HD Radio and is available online. Historically, this station is perhaps best known as WAAF, which carried a commercial rock music format for nearly 50 years in various forms of the genre, with an active rock orientation between 1989 and 2020. The station also featured personalities including Bob Rivers, Liz Wilde and Greg Hill, and was the first high-profile radio home for Opie and Anthony in the mid-1990s. Sold by Entercom (now known as Audacy, Inc.) to the Educational Media Foundation on February 18, 2020, WAAF's former programming continues on digital subchannels of WEEI-FM and WWBX, as well as on the Audacy platform. History Early years On October 5, 1960, the Federal Communications Commission awarded the Waterman Broadcasting Corporation, owner of WAAB (1440 AM), a construction permit to build a new FM radio station licensed to Worcester on 107.3 MHz, to transmit from Asnebumskit Hill in Paxton. WAAB-FM went on the air on June 15, 1961. In its early years, WAAB-FM simulcast the full service programming of its AM sister station; in 1967, it broke away from the simulcast and launched a stereo beautiful music format. WAAB-AM-FM was sold to WAAB, Inc., in 1968 for $675,000. WAAB, Inc., was owned by Ahmet Ertegun and his brother Nesuhi Ertegun, as well as record executive Jerry Wexler; all had just recently sold Atlantic Records to Warner Bros.-Seven Arts. The FM station took on new WAAF call letters on May 28, 1968; the call sign had been dropped the previous year by a station in Chicago. In later years, WAAF ownership would erroneously claim a longer history than that of its own license, stretching back to experimental FM station W1XOJ in the late 1930s. W1XOJ—later given the normal call letters WGTR—was part of the first FM network, put together by the Yankee Network and its principal, John Shepard, who at the time also owned WAAB. While WAAB-FM/WAAF