Radio annual and television yearbook (1939)

TELEVISION STATIONS IN THE UNITED S T A T E S LOCATION — PERSONNEL — FACILITIES W 2 X A X NEW YORK CITY FREQUENCY: Sight 51.25 Mcs. SOUND. 55.75 Mcs. POWER: Sight, 15.000 Watts (measured at peak of synchronizing pulses); Sound, 7,500 Watts. OWNED AND OPERATED BY: Columbia Broadcasting System. BUSINESS ADDRESS: 485 Madison Ave. PHONE: Wlckersham 2-2000. STUDIO ADDRESS: Under construction in the Grand Central Palace Bldg. TRANSMITTER AND ANTENNA LOCATION: Chrysler Bldg. (Construction to be completed by Spring of 1939). Personnel Chief Engineer Dr. Peter C. Goldmark Assistant Chief Engineer John N. Dyer Director of Television Programs . . Gilbert Seldes FACILITIES At present W2XAX is operated with a video power of 50 watts, at 485 Madison Avenue. Later in the Spring transmissions will be continued from the Chrysler Building on high power. The television transmitter will be installed on the 73rd. 74th and 75th floors of the Chrysler Building. The equipment is designed to handle a video signal with a band width from 30 cycles to approximately 4.25 megacycles. Signals of either positive or negative polarity, as desired, will be radiated. The so-called DC type of picture transmission will be utilized which means that black components in the picture are referred to an absolute and constant value corresponding to a certain degree of modulation of the final carrier. The transmitter is capable of radiating about 12 kw. of power corresponding to the maximum white in the picture, or about 15 kw. corresponding to the peak of the synchronizing pulses. The total input power is about 300 kw. including auxiliary equipment. The audio transmitter is capable of handling a frequency range from 30 to 15,000 cycles. The video and audio input and monitoring equipment will be located in a shielded room on the 74th floor where the transmitters are also situated. On the 73rd floor transformers, reactors, motor generators and water cooling equipment will be placed, while the air conditioning equipment will be on the 75th floor. The antenna consists of two pairs of dipoles horizontally oriented parallel to the building surface, the dipoles being located above each other and about Vz wavelength apart. The structure is repeated on all four sides of the building. The audio antenna is of similar construction yet will possibly consist of only one set of dipoles in order to keep the power of the audio transmitter the same as that of the video and audio carriers to their respective radiators. All antennas will be electrically heated from inside and thermostatically controlled so that detuning due to ice formation will be prevented. A coaxial cable will carry the video signals from the studio in Grand Central Terminal Building to the transmitter at the Chrysler Building. The Grand Central Studio, which is 270 feet long and 60 feet wide, has a main control room on the east side of the studio running across practically the full width of the studio. There will be an adequate number of cameras and telecine channels for both film and studio programs. W6XA0 LOS ANGELES— EST. 1931 FREQUENCY: Sight. 45.000 Kc. Sound, 54,000 Kc. POWER: Sight, 150 Watts; Sound, 150 Watts. OWNED AND OPERATED BY: Don Lee Broadcasting System. BUSINESS ADDRESS: Don Lee Bldg., Seventh & Bixel Sts. PHONE: VAndike 7111. STUDIO AND TRANSMITTER LOCATION: Same. TIME ON THE AIR: Nightly (except Sundays and holidays). Monday. 7:00 to 8:00 P.M.; Tuesday, 7:00 to 8:00 P.M.; Wednesday, 11:00 to 12:00 A.M. and 6:45 to 8:00 P.M.; Thursday, 7:00 to 8:00 P.M.; Friday, 6:45 to 8:00 P.M., and Saturday, 7:00 to 8:00 P.M. Other times experimentally, which are announced on regular schedules. Personnel Director of Television Harry R. Lubcke Assistant Director of Television Wilbur E. Thorp Television Engineer William S. Klein Television Engineer Harold W. Jury Television Producer Jaime del Valle Assistant Producer Elbert Walker Lighting Supervisor Lee M. Cannon Sound Monitor Man Richard Brace Makeup A. M. Haberman 477