Western Electric type 303A duodiode triode
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 6-pin plastic base with top contact, BT-shaped envelope. In original package. Stamped on envelope: "Western Electric / U.S.A. / 303A". Patents on box include 130[3?]579 - patent label is damaged. "Duodiode triode with indirectly heated cathode. The 303A tube comprises three distinct vacuum tube units, which are independent of each other except that sections of a single cathode structure supply electron emission for all three. Two of these units are diodes. The other is a triode. Except for the heater rating the 303A tube is similar to the 292A. Applications: Diode detector, diode rectifier for automatic volume control voltage, and triode
label: Description (Brief)
content: audio-frequency amplifier. If desired, both diodes may be used for detection, connected either in parallel for half-wave rectification or in push-pull for full-wave rectification. The latter connection requires about twice as high an input voltage as the former to give equal detector output. An alternative use of the triode unit is as a direct-current amplifier for the automatic volume control voltage." Reference: https://www.westernelectric.com/s/303A.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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323122
label: catalog number
content: 323122
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: diode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: paper (box material)
label: Measurements
content: tube: 5 in x 1 3/4 in; 12.7 cm x 4.445 cm
label: Measurements
content: box: 6 in x 2 3/8 in x 2 3/8 in; 15.24 cm x 6.0325 cm x 6.0325 cm