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เนื้อหาย่อ : HOW THIS COURSE WAS DEVELOPED Most books are written because the author, who may have been, or is teacher, has found that he is not satisfied with existing ma the subject at a particular level- this is true of Basic Radio. Many fine texts have been written on radio engineering. However, books on radio communicaiions for the student or beginner have fallen short in that they either fail to communicate to the reader by being too mathematical or too technical, or they attempt to oversimplify the subiect and thus "'water down'' the technical materiat to a point where there is little foundation left on which the student can build his future knowledge of adio. Durint his many years of tecching experience, the author found the gre at communicctive value in the visualized approach to teaching radio. As an instructor, the author had first-hand knowledge of the benefits ana drawbacks of a wide variety of teaching methods. This six-volume course on Basic Radio represents the final development of the author's notes and illusirations in the teaching of the subiect of radio. An idea is illustrated cn every page of text. Each illustration drives home a com- plete idea, with many callouts to enable the reader to get maximum instructive benefit from each illustration. Basic Radic represents the finest de elopment of instrucive material for the tec ching of radio in book formi. It is truly a radio course palataible to the studient.