Western Electric type 205D vacuum triode
date: label: date made
content: ca 1925
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 4-pin plastic base with tipped G-shaped envelope. Stamped on envelope: "Western Electric / Made in U.S.A. / 205-D / Pat. in U.S.A. / 1209324 1307510 1354939 1465381 1479778 1565603 / 1201273 RE-14572 1329283 1419528 1478072 1542385 Pat. Pend." Tyne notes that the locking pin on 205 type tubes was set 45o differently from other tubes to prevent low-power tubes from being inadvertently substituted. Reference: Tyne, "Saga of the Vacuum Tube," page 287. Tyne notes that the locking pin on 205 type tubes was set 45o differently from other tubes to prevent low-power tubes from being inadvertently substituted. Reference: Tyne, "Saga of the Vacuum Tube," page 287.
label: Description (Brief)
content: "The No. 205D is a three-element filamentary type tube intended for use as a radio-frequency amplifier, oscillator, modulator, and audio-frequency amplifier in output stages when moderate powers are required." Reference: Western Electric 205D data sheet: https://www.westernelectric.com/s/205D.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.320961
label: catalog number
content: 320961
label: accession number
content: 241556
objectType: label: Object Name
content: triode
label: Object Name
content: vacuum tube
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 2 1/4 in; 10.795 cm x 5.715 cm