M-O Valve type S625 screen grid tetrode
date: label: date made
content: 1927
label: associated date
content: 1927
name: label: maker
content: Marconi-Osram Valve Co., Ltd.
notes: label: Description (Brief)
content: A double-ended T-shaped tube with two plastic bases, one with 2 banana pins, the other with 3 pins. Stamped on envelope: “Marconi / Valve”. Donor’s card reads: “Tetrode made by the M O Valve Company, Ltd. (1927) for the Marconi Wireless Telegraph Company of England. Also bears the designation CV-1317 and British army designation ARS-6. Filament type: 6.3 volts at .3 ampere. Used as a Class A radio frequency amplifier, 250 volts for plate and screen.” See also: https://www.radiomuseum.org/tubes/tube_s625.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.324727
label: catalog number
content: 324727
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: tetrode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 in x 1 1/2 in; 12.7 cm x 3.81 cm