De Forest type 424 tetrode
date: label: date made
content: ca 1934
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: A 5-pin plastic base with top contact, cylindrical perforated grid, S-shaped envelope. Stamped on base: "de Forest / -Audion- / -424-"; written on base: "nil". One paper label reads: "Date 1/4/35 / This tube tests / Feeble / We recommend replacement / with a National Union tube / 50." That label placed over top of another that reads: "Fill. OK / 22". Reference: https://www.radiomuseum.org/tubes/tube_424.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN80536U05
objectType: label: Object Name
content: tetrode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: composition (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: electron tube: 4 7/8 in x 1 3/4 in; 12.3825 cm x 4.445 cm