the Empire State Building

Broadcast stations

New York City is the largest media market in the United States. Since the September 11, 2001 attacks, nearly all of the city's commercial broadcast stations (both television and FM radio) have transmitted from the top of the Empire State Building, although a few FM stations are located at the nearby Condé Nast Building. Most New York City AM stations broadcast from just across the Hudson River in New Jersey.

Broadcasting began at Empire on December 22, 1931, when RCA began transmitting experimental television broadcasts from a small antenna erected atop the spire. They leased the 85th floor and built a laboratory there, and—in 1934—RCA was joined by Edwin Howard Armstrong in a cooperative venture to test his FM system from the Empire antenna. When Armstrong and RCA fell out in 1935 and his FM equipment was removed, the 85th floor became the home of RCA's New York television operations, first as experimental station W2XBS channel 1, which eventually became (on July 1, 1941) commercial station WNBT, channel 1 (now WNBC-TV channel 4). NBC's FM station (WEAF-FM, now WQHT) began transmitting from the antenna in 1940. NBC retained exclusive use of the top of the Empire until 1950, when the FCC ordered the exclusive deal broken, based on consumer complaints that a common location was necessary for the (now) seven New York television stations to transmit from so that receiving antennas would not have to be constantly adjusted. Construction on a giant tower began. Other television broadcasters then joined RCA at Empire, on the 83rd, 82nd, and 81st floors, frequently bringing sister FM stations along for the ride. Multiple transmissions of TV and FM began from the new tower in 1951. In 1965, a separate set of FM antennas were constructed ringing the 102nd floor observation area. When the World Trade Center was being constructed, it caused serious problems for the television stations, most of which then moved to the World Trade Center as soon as it was completed. This made it possible to renovate the antenna structure and the transmitter facilities for the benefit of the FM stations remaining there, which were soon joined by other FMs and UHF TVs moving in from elsewhere in the metropolitan area. The destruction of the World Trade Center necessitated a great deal of shuffling of antennas and transmitter rooms in order to accommodate the stations moving back uptown.

As of 2007, the Empire State Building is home to the following stations:

TV: WCBS-TV 2, WNBC-TV 4, WNYW 5, WABC-TV 7, WWOR-TV 9 Secaucus, WPIX-TV 11, WNET 13 Newark, WNYE-TV 25, WPXN-TV 31, WXTV 41 Paterson, WNJU 47 Linden, and WFUT-TV 68 Newark
FM: WXRK 92.3, WPAT-FM 93.1 Paterson, WNYC-FM 93.9, WPLJ 95.5, WQXR-FM 96.3, WQHT-FM 97.1, WSKQ-FM 97.9, WRKS-FM 98.7, WBAI 99.5, WHTZ 100.3 Newark, WCBS-FM 101.1, WRXP 101.9, WWFS 102.7, WKTU 103.5 Lake Success, WAXQ 104.3, WWPR-FM 105.1, WCAA 105.9 Newark, WLTW 106.7, and WBLS 107.5