Valvo type DDD25 double triode
date: label: date made
content: ca 1942
name: label: maker
content: Valvo, GmbH
notes: label: Description (Brief)
content: A double-triode used by the German military during World War II. Possibly from a radiosonde. An 8-pin metal base with central post and glass insulators, tipless T-shaped envelope with silvered top. Stamped on top: "Valvo / DDD25", on side: "Wehrmacht / BAL / [??] / 2[??] / 1744 E" . Reference: https://www.radiomuseum.org/tubes/tube_ddd25.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: EM.323725
label: catalog number
content: 323725
label: accession number
content: 254076
label: accession number
content: 257456
objectType: label: Object Name
content: triode
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes; Triode
physicalDescription: label: Physical Description
content: glass (envelope material)
label: Physical Description
content: metal (base material)
label: Measurements
content: electron tube: 6.8 cm x 3.3 cm; 2 11/16 in x 1 5/16 in