Vacuum-tubes
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RCA home study course materials
RCA Institute, Inc. was an electronics school and subsidiary of the RCA Corporation, one of the country's leading manufacturers and vendors of radios, phonographs, televisions, and a wide array of consumer and military electronics products. The school opened in 1909 as the Marconi Institute. This is a small collection of RCA home study lesson booklets for courses in television servicing, radio-television electronics, and electronic fundamentals. The instruction manuals all date to the 1950s.