Western Electric type 350B beam power tetrode
date: label: date made
content: ca 1940
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 7-pin plastic base with center post, domed envelope, cylindrical shield. Stamped on base: "Western Electric / U.S.A. / 552 / 350B". Donor’s card reads: “Beam power tetrode made by the Western Electric Company about 1940. Standard 7-pin octal base, and primarily intended for use as an audio output tube. Heater type: 6.3 volts at 1.6 amperes. Amplification factor:- 400. For Class A audio amplifier: 400 volts on the plate, 250 volts on the screen, zero control grid bias, this tube can give 25 watts of audio power.”
label: Description (Brief)
content: "The 350B is a beam power tetrode of the heater-cathode type. It is designed for use as an audio-frequency amplifier or as a radio-frequency oscillator." Reference: data sheet: https://www.westernelectric.com/s/350B.pdf.
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.324949
label: catalog number
content: 324949
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 2 in; 12.7 cm x 5.08 cm