The 135-hour quinmester course covers study of basic radio circuits as applied to vacuum tube radios in six blocks of instruction: orientation; AM receivers with tubes; no signal, audio failure; distortion; weak, noisy signals; and a post-test. Each block is subdivided into several units, and block objectives are outlined. Completion of AC Circuits and Active Devices (9785.02) is a prerequisite. The course emphasizes diagnostic skills and those manipulative skills having to do with use of instruments and tools with the object of repairing items in a production shop environment. An answer key is provided for the two-part post-test, and a bibliography lists basic and supplementary references and films. (AG)