RCA type 235 screen grid radio frequency amplifier
date: label: date made
content: ca 1934
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A plastic 5-pin base with top contact, mesh grid, S-shaped envelope. Base Stamped: "Radiotron / 235"; on envelope: "RCA". Donor’s card reads: “Screen grid radio frequency amplifier made by the Radio Corporation of America in the 1930s. This design was widely used in AM broadcast receivers. Heater: 2.5 volts at 1.75 amperes. Plate: 275 volts, screen grid 90 volts.” See also: https://www.radiomuseum.org/tubes/tube_235.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.324650
label: catalog number
content: 324650
label: accession number
content: 252994
objectType: label: Object Name
content: tetrode
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 in x 1 3/4 in; 12.7 cm x 4.445 cm