General Electric type GL-7-D-21 tetrode
date: label: date made
content: ca 1954
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: A three-layered glass envelope with top contact and a large heat sink on the bottom. Stamped: “General Electric / 932”. Donor’s card reads: “Tetrode made by General Electric Company and used as a Class C amplifier in television station WMBR at Jacksonville, Florida in the 1950s. Rated at 1250 watts up to 110 megacycles. For Class C operation: 4000 volts at 1 ampere in the plate; screen 750 volt; 500 volts negative control grid bias, for an output of 1250 watts.
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.324517
label: catalog number
content: 324517
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: 7 1/2 in x 5 in; 19.05 cm x 12.7 cm