PREFACEThe widespread interest in radio telephone communication, which has been aroused during the last year, has created a demand for a book which describes in a simple manner the methods and apparatus used for the reception of radio phone speech and music. The authors of this little volume, experienced both in the practice of the art of radio communication and in its exposition to students and non-technical audiences, have cooperated to meet this demand.While many of the technical details of the subject are complex, nevertheless #a satisfactory understanding of the operation of a radio transmitting and receiving system can be obtained without the use of mathematical formulas and complicated physical concepts. By analogies taken from everyday experience, by using relatively few technical terms, and by repetition of the more important ideas, the authors of the several chapters believe they have completed a logical and coordinated presentation of the subject, in a style suitable...

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