Mullard "ORA" type A receiving valve
date: label: date made
content: ca 1923
name: label: maker
content: Mullard
notes: label: Description (Brief)
content: A British triode. Metal four-pin base with four brass pins and plastic insulator. "P" and "G" stamped on shell. Tipped tubular glass envelope. Stamped on one side: a circuit diagram with "O", "R", and "A" Stamped on other side: "Trade Mark / Radio Mullard Valve / 3330". A round paper label on one side seems to have faded to illegibility.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Weston Electrical Instrument Corp., thru John H. Miller
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313293
label: catalog number
content: 313293
label: accession number
content: 181342
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 3 3/4 in x 1 1/4 in; 9.525 cm x 3.175 cm