Carl George Dietsch (1900-1978) was an electrical engineer who specialized in shortwave radio transmitters. He supervised the construction of radio stations for the Radio Corporation of America (RCA) and the National Broadcasting Company (NBC) from the 1930s to the 1960s, including locations in Brazil, Argentina, the Philippines, Japan, and Morocco. This collection consists of materials relating to Dietsch’s projects for RCA and NBC, particularly concerning the construction of a radio station in Tangier, Morocco, as well as the World War II Voice of America project in Dixon, California. The bulk of the collection material spans from the 1920s to the 1960s, with some later material from Dietsch’s time as a private engineering consultant. The collection includes correspondence, patent material, trade catalogs and publications, manuscript material, photographs and negatives, blueprints, diazotypes, audiovisual material, and drafting tools. This collection would be useful to researchers interested in shortwave radio station construction.

Charles Jennings (1916-2006) served for more than forty years as RCA Global Communications’ primary liaison in Japan, figuring prominently in the development of post-World War II Japanese communications systems. The collection consists primarily of black and white and color photographs, albums, advertising posters, papers, and unbound scrapbook boards of photographs and ephemera. The images predominantly relate to Jennings’ business and personal life during his time in Japan, addressing the themes of Japanese and trans-Pacific telecommunications activities, particularly relating to RCA; postwar Japanese-American business and informal diplomatic relations; and life in postwar Tokyo.