Machlett type ML-220-C triode
date: label: date made
content: ca 1950
name: label: maker
content: Machlett Laboratories, Inc.
notes: label: Description (Brief)
content: A large glass tube with a copper heat sink on the bottom, metal top cap with contact, and side contact. Donor’s card reads: “Triode made by Machlett Laboratories of Bridgedale, Conn. Used primarily in broadcasting stations as modulators and amplifiers, up to 4 megacycles. Donated by Machlett in 1957. A late model of the type 220-C Western Electric tube [catalog number 324547]. Tungsten filament: 104 volts at 41 amperes. For Class C radio frequency operation: 7500 volts at 1.1 amperes on the plate, 300 volt negative control grid bias, for an output of 5500 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.324947
label: catalog number
content: 324947
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 20 1/2 in x 6 in x 4 1/4 in; 52.07 cm x 15.24 cm x 10.795 cm