The Secretary of State to the Ambassador in Mexico (Daniels)

No. 607

Sir: The Department refers to your despatch No. 2158 of January 22, 1935,73 with enclosures, relating to the complaint on behalf of station KPRC, located in Texas, against serious interference caused by station XENT, Nuevo Laredo, Mexico.

According to the Frequency List published by the Bureau of the International Telecommunication Union, the Bureau was notified on March 19, 1930, of the use of the frequency of 920 kilocycles by the broadcasting station KPRC, Sugarland, Texas, a station owned by the Houston Printing Company and operating with a power of 1 kilowatt in the nighttime and 2.5 kilowatts in the daytime. Apparently the station has recently been operating with a daytime power of 5 kilowatts.

According to the publications of the Bureau above mentioned, the recently completed broadcasting station XENT is owned by Cia. Ind. Universal de Mexico, S. A., and was assigned the frequency of 1115 kilocycles and a power of 150 kilowatts. The Department is informed by the Federal Communications Commission, however, that according to reports from its monitoring stations, XENT was operating recently on 1120 kilocycles and shifted to 910 kilocycles sometime during December 1934 or January 1935.

In Article 5, Section 16, of the General Radio Regulations annexed to the Washington Radiotelegraph Convention, 1927, in force between [Page 809] the United States of America and Mexico, it is provided as follows:

“§16. (1) The frequencies assigned by Administrations to all new fixed land or radio broadcasting stations which they may have authorized or of which they may have undertaken the installation must be chosen in such a manner as to prevent so far as practicable interference with international services carried on by existing stations the frequencies of which have already been notified to the International Bureau. In the case of a change of the frequency of an existing fixed land or broadcasting station, the new frequency assigned to this station must comply with the above conditions.”

It is requested that you bring this matter to the attention of the appropriate authorities of the Mexican Government, in order that steps may be taken to eliminate so far as practicable the interference in question.

Very truly yours,

For the Secretary of State:
R. Walton Moore
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