as a CBS affiliate. The stations moved to a new studio in Bala Cynwyd in 1952. In 1957, the Bulletin sold WCAU-AM-FM-TV to CBS. This came because the Bulletin had recently bought WGBI-TV in Scranton, Pennsylvania and changed its call sign to WDAU-TV to complement WCAU. However, the two television stations' signals overlapped so much that it constituted a duopoly under Federal Communications Commission (FCC) rules of the time. CBS had to get a waiver to keep its new Philadelphia cluster. In addition to significant overlap of the television stations' grade B signals, the FCC normally did not allow common ownership of clear channel stations with overlapping nighttime signals. Talk and news In the 1960s, WCAU gradually began moving away from music programming, as most CBS stations. By 1967 it had become a talk station with considerable strengths in news and sports. All of Philadelphia's major professional sports teams had WCAU as their flagship radio station at one time or another. Although the station's ratings were good, in the mid-1970s, CBS made a corporate decision to move WCAU to an all-news format. All-news had earlier been established on WCBS in New York City, KNX Los Angeles and several other CBS AM stations. WCAU never caught up to established all-news rival KYW 1060 AM. By 1980, WCAU was making moves to reclaim its heritage as a talk and sports leader. However, 96.5 WWDB-FM had established itself as a strong talk station, and WCAU struggled for years to attract listeners and establish a consistent image. Oldies and sports On August 15, 1990, CBS abruptly changed the WCAU call sign after 68 years, becoming WOGL. It dropped the talk format in favor of oldies of the 1950s, 60s and 70s. It was partially simulcast with its FM sister station, by then WOGL-FM. In 1993, the AM station began running sports talk after 7 p.m.. The station went all-sports as WGMP (The Game) on March 18, 1994. However, once again, the station was taking on an entrenched competitor, WIP 610 AM, and WGMP's largely syndicated program lineup won few listeners away from WIP's heavily local schedule. Merger with Westinghouse A year later, CBS merged with Westinghouse Electric Corporation, thus making 1210 AM a sister station to its long-time rival, 1060 KYW. With this move, the higher-rated KYW became the flagship station of CBS Radio's Philadelphia cluster. Realizing that WGMP would never be able to