Western Electric type 212D transmitting triode
date: label: date made
content: 1933
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 250 watt transmitting triode with 4-pin base, T-shaped envelope. Marked: "Western Electric / Made in U.S.A. / 212 D / Patent / 1209324 RE-14572 1303579 1307510 1329283 1353976 1419528 1435867 1456528 1463850 1454101 1478072 1479991 1491362 1536855 1542366 1542385 1590352 1505230 1513630 1547994 1573008 / Pat. Pend." Also, "3" and "9897 2". On base: "Out Dec 5 1934 / low output. "A three-element, air-cooled, general purpose tube. It may be used as an audio-frequency power amplifier or modulator." Reference: https://www.westernelectric.com/s/212D.pdf.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323154
label: catalog number
content: 323154
label: accession number
content: 250988
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: 13 1/2 in x 3 1/2 in; 34.29 cm x 8.89 cm