RCA / Cunninham type C327 vacuum triode
date: label: date made
content: ca 1927
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 5-pin plastic base with tipless S-shaped envelope. Mica insulator. Stamped on base: "[C logo] / Cunningham / C327"; and C logo on top. Donor's card reads: "Triode made by the Radio Corporation of America about 1926 or 1927. Developed from the UX-225 tube [catalog number 324397], and from others, for use as a detector and radio frequency amplifier in AC operated radio receivers. One of the first models of heater-cathode tubes made in production quantities. See [324397] for details. UX-227 has a 2.5 volt heater at 1.75 amperes. en used as an amplifier as much as 250 volts can be used on the plates, with a 21 volt negative grid bias." See also: https://www.radiomuseum.org/tubes/tube_c327.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324399
label: catalog number
content: 324399
label: accession number
content: 252994
objectType: label: Object Name
content: Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 1 3/4 in; 11.43 cm x 4.445 cm