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Show : : i S V Ml I Morris S. Strock of the Government Radio Laboratory Has Designed and Built. an Apparatus to Measure Frequencies of Stations. With short wave radio transmission now emanating from practically every corner of the earth, a tremendous Interest In-terest in this form of communication is being predicted for this summer. According to the most recent list cf the world's short-wave stations there are approximately 1H0 transmitters transmit-ters operating on regular schedules on wave lengths between 13 and 115 meters. The total is expected to be almost doubled by the end of the year. United States Leads. The United States maintains the lead in the short-wave stations, principally prin-cipally through its naval transmitters and the experimental stations of the low-wave pioneers among the radio manufacturers. General Electric company, com-pany, A. H. Grebe & Co., the Westing-house Westing-house Electric and Manufacturing company, the Radio Corporation of America together operate practically one-fourth of the high-frequency plants. Included in the list of stations on low waves are transmitters located in Germany, England, Java, Sweden, Holland, Russia, France, Hawaii, Samoa, Sa-moa, Canal Zone, the Philippines, Japan Ja-pan and aboard the ships of the United Unit-ed States fleet scattered throughout the world. In addition there are many others operated by amateurs who have received re-ceived experimental licenses to broadcast broad-cast within the low-wave bands assigned as-signed for that type of work. Through co-operation of the International Radio Ra-dio Amateur union, which was created last year, the low-wave communications, communica-tions, both in code and voice, are being be-ing relayed extensively throughout the world. "Radio Boat" Experiment. Among the interesting experiments to be undertaken soon in short-wave transmission is the "radio boat" to be launched by the Grebe company, and which is expected to cover the Bermuda races, not only for shortwave short-wave receivers but for broadcasting by the higher wave stations. The extent to which the short wave is being used for re-broadcasting in other parts of the world was shown recently in the announcement by tlie General Electric company that a scheduled relay of a program for the annual agricultural show of the South African Union was received clearly and re-transmitted. Included in the two-hour program was an address by Secretary of Agriculture Jardine and a concert from Schenectady. |
