Abstract
The development of short wave communication by the Radio Corporation of America is outlined. A summary of short wave installations, with call letters, wave-lengths and services to which each installation is assigned, is submitted. Traffic charts showing the diurnal and seasonal characteristic of various wavelengths over typical circuits are shown. An outline of the technical problems inherent to the development of tubes and transmitter circuits is discussed. Methods are described for obtaining proper operation of tubes and transmitters at these very short wave lengths. The paper is illustrated with typical pictures and charts showing transmitter development and traffic performance.
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