Philips type A409 "Miniwatt" vacuum triode
date: label: date made
content: ca 1927
name: label: maker
content: Philips
notes: label: Description (Brief)
content: A 4-pin brown plastic base (brass banana pins), tipless S-shaped envelope. Stamped: "A409 / Philips / Miniwatt / 3,4-4,0V / 10-120V. / -130-". Paper label with collection #5m-58. Reference: https://www.radiomuseum.org/tubes/tube_a409.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.315578
label: catalog number
content: 315578
label: accession number
content: 216300
label: collector/donor number
content: 5m-58
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 3 3/4 in x 1 1/2 in; 9.525 cm x 3.81 cm