Daven type MU20 vacuum triode in original box
date: label: date made
content: ca 1927
name: label: maker
content: Daven Radio Co.
notes: label: Description (Brief)
content: A 4-pin plastic base with long pins, partly silvered S-shaped envelope. In original box dated 1926. Base stamped: "M / 1" and "Daven Amplifier / Type MU-20 / Fil. Volts 6 / Fil. Amp. 1/4". Paper label on tube reads: "Fil. Volts 6 Fil. Amp. 1/4 / Daven Tube / MU 20 / Warning: / Positively no / adjustments if / this label is removed. / No. 54078 / Daven Radio Corporation . Trade Mark Reg. / Dist. Test [blank] / Dealer test [blank]". Reference: https://www.radiomuseum.org/tubes/tube_mu20.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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323244
label: catalog number
content: 323244
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: triode
physicalDescription: label: Physical Description
content: cardboard (box material)
label: Measurements
content: tube: 4 1/4 in x 1 3/4 in; 10.795 cm x 4.445 cm
label: Measurements
content: box: 5 in x 2 5/8 in x 2 1/2 in; 12.7 cm x 6.6675 cm x 6.35 cm