Cathode Ray Tube for Television

Description (Brief):

RCA demonstrated electronic television at the 1939 World’s Fair and other manufacturers quickly began to develop products. Allen B. Dumont Laboratories already produced one of the main components, cathode ray tubes or CRTs. Dumont made these tubes for oscilloscopes but understood they would also serve as picture tubes. This tube has a 3.5 inch face with a white phosphor. The clear envelope allows one to see the electron gun mechanism that produces the stream of cathode rays.

Description (Brief)

Marked: "149" inked on press. Stamped with Dumont maker's stamp and "Globe Television and Phone Corp." Paper label handwritten: "Fil. Current 5.6A Med[?] Elect. -20V Accel. Elect. +840V Accel. Current 250 microamps" Fil = filament, accel = accellerator. Dumont provided tubes for its own sets and for other manufacturers like Globe Television and Phone Corp. of Boston. Globe made mechanical television sets in the early 1930s and presumably was moving into electronic television.

Date Made: ca 1940

Maker: DuMont Company

Location: Currently not on view

See more items in: Work and Industry: Electricity, Communications, American Enterprise


Exhibition Location:

Credit Line: from Fairchild Camera and Instrument Corporation, Dumont Laboratories Div., thru Edgar S. Hill

Data Source: National Museum of American History

Id Number: EM.328322Catalog Number: 328322Accession Number: 270517

Object Name: cathode ray tubetelevision picture tube

Physical Description: glass (overall material)metal (overall material)plastic (overall material)Measurements: overall: 12 in x 3 1/2 in; 30.48 cm x 8.89 cm


Record Id: nmah_1348434

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.