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RCA Radiotron Radio Tube Type 80 With Carton, by RCA, New Jersey, 20th Century
Inventory Number: 91686
Number of documents: 3
Document Type: Miscellaneous Note
Document Heading: Inscription
Text:
"RCA 80" printed on exterior surface carton lid. "RCA MANUFACTURING / COMPANY, INC / CAMDEN, N.J., U.S.A" printed on interior of carton lid apron. "80" printed on exterior surface of bulb. "RCA / MADE IN / U.S.A. / S2" printed on exterior surface of tube base.
Document Type: Miscellaneous Note
Document Heading: Manufacturer Details
Text:
In October 1919, the General Electric (GE) Company (US) founded the Radio Corporation of American (RCA). This was in response to the realisation by the US military and the US government that it would be advisory for American radio companies not to be controlled by foreign companies. This was in direct response to the returning of radio stations to the American Marconi Company - controlled by the British Marconi Company - at the end of the First World War. In November 1919, the American Marconi Company merged with RCA. RCA was founded as a separate company from GE with the aim of providing ship-to-shore and transoceanic communication. Up until the foundation of RCA Radiotron in 1930, the company had no separate manufacturing facilities and, instead, acted as a distribution agent for assorted GE and Westinghouse apparatus, including radio valves. It must, however, be noted that the aforementioned radio valves were sometimes marked as a 'radiotron' model from about 1921 onwards. Between 1930 and 1932, RCA Radiotron was reorganised as an independent company that manufactured as well as marketed electronic technologies. RCA continued to build upon this success and eventually became a conglomerate with a diverse range of technological interests. In 1986, the RCA Corporation (as it was then known) was bought back by GE.
Document Type: Miscellaneous Note
Document Heading: Technical Details
Text:
The Type 80 tube led standard practice since in its earlier, more bulbous form, it was the landmark full-wave rectifier and very probably the first mass-produced rectifier to use oxide-coated tape filaments. It was very much a multi-purpose device but also required high standards and complexity of design and manfacture, especially during initial stages of manufacture in the late 1920s. With a B4 base and a slight drop in its filament voltage, the type 80 became the standard pre-war British/European rectifier for all types of domestic AC radio. With an octal base on the type 80, it became the standard 1940s rectifier throughout the world. Replace the tape filaments by heater/cathode assemblies (80S) and the type 80 evolved to become the standard international post-war rectifier.
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