WCAU

WCAU (channel 10) is a television station in Philadelphia, Pennsylvania, United States, serving the Delaware Valley. It is owned and operated by the NBC television network through its NBC Owned Television Stations division.

Under common ownership with Mount Laurel, New Jersey–licensed Telemundo outlet WWSI (channel 62) and regional sports network NBC Sports Philadelphia, both WCAU and WWSI share studios in the Comcast Technology Center on Arch Street in Center City, with some operations remaining at their former main studio at the corner of City Avenue and Monument Road in Bala Cynwyd. The stations broadcast from the same transmitter in the Roxborough section of Philadelphia.

In 1946, the Philadelphia Evening Bulletin secured a construction permit for channel 10, naming its proposed station WPEN-TV after the newspaper's WPEN radio stations (950 AM), now WKDN, and 98.1 FM, later WCAU-FM and now WOGL. The picture changed dramatically in 1947, when The Philadelphia Record folded.

The Bulletin inherited the Record's "goodwill", along with the rights to buy the radio station WCAU (1210 AM, now WPHT) and the original WCAU-FM (102.9 FM, now WMGK) from their longtime owners, brothers Isaac and Leon Levy. The Bulletin sold the less-powerful WPEN and WCAU-FM, with the latter being renamed WPEN-FM; it is now WMGK. The Bulletin kept its FM station, renaming it WCAU-FM to match its new AM sister. The newspaper also kept its construction permit for channel 10, renaming it WCAU-TV.

WCAU-TV went on the air March 1, 1948, as Philadelphia's third television station with an initial test pattern on Channel 10. It carried its first CBS network show on a "sneak preview" basis on March 3, but the official opening of the station was not until May 23, 1948. It secured an affiliation with CBS through the influence of the Levy brothers, who continued to work for the newspaper as consultants. WCAU radio had been one of CBS' original 16 affiliates when the network launched in 1927. A year later, the Levy brothers persuaded their brother-in-law, William S. Paley, to buy the struggling network. The Levy brothers were shareholders and directors at CBS for many years. Due to this long relationship, channel 10 signed on as CBS's third television affiliate.

In the late 1950s, the Federal Communications Commission (FCC) collapsed northern Delaware, South Jersey, and the Lehigh Valley into the Philadelphia market. The Bulletin realized that channel 10's original tower, atop the PSFS Building in Center City, was not nearly strong enough to serve this larger viewing area. In 1957, WCAU-TV moved to a new 1,200-foot (366 m) tower in Roxborough, which added most of Delaware, the Jersey Shore and the Lehigh Valley to its city-grade coverage.

Also in 1957, the Bulletin formed a limited partnership with the Megargee family, owner of CBS affiliate WGBI-TV (channel 22) in Scranton. As part of the deal, channel 22's call letters were changed to WDAU-TV (WDAU's call letters were changed again to WYOU in 1986). Soon afterward, the FCC ruled that the Bulletin could not keep both stations due to a large signal overlap in the Lehigh Valley. Although the Bulletin had only bought a minority stake in channel 22, the FCC ruled that this stake was so large that the two stations were effectively a duopoly. The Bulletin could not afford to get a waiver to keep both stations, so it opted to keep its stake in WDAU-TV and sell the WCAU stations to CBS. CBS had to seek a waiver to buy the WCAU stations, as the signals of WCAU's AM and television stations overlapped with those of WCBS radio and WCBS-TV in New York City (in the case of the AM outlets, both were clear-channel stations; the FCC at the time usually did not allow common ownership of clear-channel stations with overlapping nighttime coverage areas). However, in its application for a waiver, CBS cited NBC's then-ownership of WRCV-TV in Philadelphia (channel 3, now KYW-TV) and WRCA-TV in New York City (now WNBC). The FCC readily granted the waiver, and CBS took control in 1958.

In July 1994, CBS entered into a long-term affiliation agreement with Westinghouse (Group W) Broadcasting, owners of Philadelphia's longtime NBC affiliate, KYW-TV, and its sister stations in Baltimore (WJZ-TV) and Boston (WBZ-TV). Westinghouse converted all three of those stations into CBS affiliates. CBS was reluctant to include KYW-TV in the deal since it had been a very distant third in the Philadelphia ratings for more than a decade. In contrast, WCAU was a solid runner-up to ABC-owned station WPVI-TV (channel 6). Ultimately, CBS decided to affiliate with channel 3 and sell channel 10, ending a 47-year relationship (including 37 years of ownership) with the station.