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Amplifiers (Electronics)

Subject Source: Library of Congress Subject Headings

Found in 3 Collections and/or Records:

Allen D. Cardwell Manufacturing Corporation records

Accession: 2333

The Allen D. Cardwell Manufacturing Corporation was a major producer of radio and telecommunications equipment during the twentieth century. Cardwell sold its products to the United States Government, major corporations, and individual consumers. The records contain technical information such as patents and design drawings, as well as a vast array of sales and promotional material from the 1920s.

Dates: 1897-1960; Majority of material found within 1920-1960

Charles A. Rosencrans lab notebooks

Accession: 2549

Charles A. Rosencrans (1908-1991) was an RCA engineer who specialized in radio transmission. His notebooks largely consist of fragmentary handwritten notes from both his career at RCA and from his studies in electrical and mechanical engineering at Lehigh University.

Dates: 1929-1959

Sidney Cooper photographs, circa 1964-1987

Accession: 2464-75Identifier: 2464-75-III.
Scope and Content:

The Sidney Cooper photographs contain 47 prints, both color and black and white, as well as a handful of paper documents. These images and documents illustrate work done in the 1960s and 1970s on audio amplifiers, Spectra 70, and the ICBM Minutemen Computer.

Dates: circa 1964-1987