Western Electric type 297A thyratron
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: Plastic 4-pin base with T-shaped envelope, in original container. Markings: "Western Electric / U.S.A. / 297-A". For any given anode potential there is a critical grid potential. Once the discharge has started, the grid loses control. Action is essentially that of a rectifier. "A three element, argon filled, filamentary thyratron. This tube is a rectifier of low internal impedance in which the starting of the conduction cycle may be controlled by the grid. It is intended for use in special circuits as a relay or trigger-action device. A few of its other possible uses are: as a controlled-frequency oscillator giving a square wave-form, as a voltmeter or volume level-indicator, or as a source of sweep-voltage for a linear time axis." Reference: https://www.westernelectric.com/s/297A.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.322721
label: catalog number
content: 322721
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: Vacuum tube
label: Object Name
content: vacuum tube
label: Object Name
content: thyratron
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: cardboard (box material)
label: Measurements
content: tube: 4 in x 1 1/8 in; 10.16 cm x 2.8575 cm
label: Measurements
content: box: 5 in x 1 3/4 in x 1 7/8 in; 12.7 cm x 4.445 cm x 4.7625 cm