Heinl radio business letter (July-Dec 1940)

Record Details:

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7/23/40 D.C. AND N.Y.C. TELEVISION OUTLETS SPEEDED New television stations for the National Capital and New York City were speeded by action of the Federal Communications Com¬ mission in confirming previous tentative approval of applications by the Allen B. DuMont Laboratories, Inc., for such outlets. The Commission also authorized DuMont and Columbia Broadcasting System to start television broadcasts under the new promotional rules from their Passaic and New York stations respectively. DuMont’s new Washington station will operate on new tele¬ vision channel No. 1 (50,000-56,000 kilocycles) with 1 kilowatt power for aural and visual transmission, and its New York station will use television channel No. 4 (78,000-84,000 kilocycles) with like power. DuMont’s present television station W2XVT, at Passaic, N.J. , is enabled to increase power to 5 kilowatts, aural and visual, and transmit on channel No. 4. Columbia Broadcasting System sta¬ tion W2XAB, at New York, can use channel No. 2 (60,000-66,000 kilo¬ cycles), 7-J kilowatts power, aural and visual. These new authorizations closely follow Commission action last week in speeding construction of San Francisco's first tele¬ vision station, to be operated by Don Lee Broadcasting System, and, at the same time, giving the "go" signal for Don Lee station W6XA0, at Los Angeles, and National Broadcasting Co. station W2XBS, New York, to use new television channel No. 1 (50,000-56,000 kilocycles), which the proposed San Francisco station will likewise employ. Opening additional television facilities throughout the country is made possible by the Commission’s new rules encouraging experimental operation to promote the art. Approvals in all cases are contingent upon programs to foster research and development. The DuMont Washington and New York stations, for example, will inquire into the advantages of various types of film projectors, experiment with mobile pick-up utilizing wire links and radio links, and will seek public cooperation on various types of program mater¬ ial. Coaxial cable will be used in transmitting programs between Washington and New York, and the Washington station will test the practicability of providing satisfactory service to Washington and Baltimore from a single transmitter. The program of research for DuMont's Passaic station embraces tests of various antenna systems utilizing both vertical and horizontal radiators, experiments with systems other than RMA and DuMont, and investigating the effects of phase-shifts, noise, field patterns, etc. ; test of transmitter equipment, including power tubes; ultimate experiments in the possible use of FM (fre¬ quency modulation) for television broadcasting on the ultra-high frequencies. 5