stations in Columbus and Detroit. WDTV moved its facilities to channel 2 on November 23, 1952; WPSU-TV would later sign on with the channel 3 frequency for the Johnstown/Altoona market. Shortly after moving, it was the first station in the country to broadcast 24 hours a day, seven days a week, advertising that its 1:00–7:00 a.m. Swing Shift Theatre served the "200,000 workers [in their viewing area] who finish shift work at midnight." DuMont's network of stations on coaxial cable stretched from Boston to St. Louis. These stations were linked together via AT&T's coaxial cable feed with the sign-on of WDTV allowing the network to broadcast live programming to all the stations at the same time. Stations not yet connected to the coaxial cable received kinescope recordings via physical delivery. Dealing with competition Until the end of the freeze, WDTV's only competition came in the form of distant signals from stations in Johnstown, Altoona, Wheeling and Youngstown. However, Pittsburgh saw two UHF stations launch during 1953—ABC affiliate WENS (channel 16, later to become WINP-TV), and WKJF-TV (channel 53, later to become WPGH-TV), an independent station. At the time, UHF stations could not be viewed without the aid of an expensive set-top converter, and the picture quality was marginal at best with one. UHF stations in the area faced an additional problem because Pittsburgh is located in a somewhat rugged dissected plateau, and the reception of UHF stations is usually poor in such terrain. These factors played a role in the short-lived existences of both WKJF and WENS. Although Pittsburgh was the sixth largest market in the country (behind New York City, Chicago, Los Angeles, Philadelphia and Washington/Baltimore), the other VHF stations in town were slow to develop. This was because the major cities in the Upper Ohio Valley are so close together that they must share the VHF band. After the FCC lifted the license freeze in 1952, it refused to grant any new commercial VHF construction permits to Pittsburgh in order to give the smaller cities in the area a chance to get on the air. WDTV had a de facto monopoly on Pittsburgh television. Like its sister stations WABD and WTTG, it was far stronger than the DuMont network as a whole. According to network general manager Ted Bergmann, WDTV brought in $4 million a year, which was more than enough to keep the network afloat. Owning the