Heinl radio business letter (July-Dec 1930)

Record Details:

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MEXICAN "OUTLAWS" USE U.S. CHANNELS. An international conference for the purpose of redistributing the broadcasting channels assigned to North America looms as a result of increasing complaints that Mexican stations are causing interference in this country by utilizing wave lengths assigned to the United States and Canada, The matter has already been taken up with the State Department by government radio officials, but no definite conclusions have been reached. Under the existing"gentleman,s agreement", Canada has exclusive use of six of the 96 channels available to this continent and shares a dozen with this country. Mexico, which was not interested in broadcasting at that time, was not a party to the agreement. Records of the electrical equipment division show that there are 35 radio stations operating in Mexico now, accord¬ ing to L. D. Batson, but most of them are of such small power that they do not bother listeners in the United States. The two largest stations are XSW, at Mexico City, operating with 5,000 watts, and XED, at Reynosa, in the Rio Grande Valley, which uses 10,000 watts. They went on the air only a few months ago. Sixteen stations have been licensed by Mexico in 1930, according to Department of Commerce reports. Rumors are that the Mexico City station will soon increase its power to 50,000 watts, the equivalent of any station in this country. Nine Mexican stations use power of 1,000 watts, or more, according to Mr. Batson, and seven of these operate on channels assigned to the United States while the other two broad¬ cast on a Canadian cleared channel; Station XEW is operating on 780 kilocycles, ac¬ cording to the Department of Commerce records. This channel is assigned to Station CKY, at Winnipeg, which uses 5,000 watts, and to six regional stations in this country with comparatively low power. These stations are WMC, Memphis; WEAN, Providence; WISJ, Madison; KTM, Los Angeles; WTAR, Norfolk; and KELW, Burbank, Calif. Ruinous interference would result, it is said, if this Mexican station were to increase its power to 50,000 watts. The Reynosa station is operating on Canada fs cleared channel of 960 kilocycles. A 4,000 watt Toronto station and several low power stations use the channel.