The station suspended operations on February 20, 1933, as monochrome television transmission standards were in flux, and in the process of changing from a mechanical to an all-electronic system. W2XAB returned to the air with an all-electronic system in 1939 from a new studio complex in Grand Central Station and a transmitter atop the Chrysler Building, broadcasting on channel 2.[98] W2XAB transmitted the first color broadcast in the United States on August 28, 1940.[99]