Sylvania type 1-B-24 TR tube
date: label: date made
content: 1944
name: label: maker
content: Sylvania Electric Products Inc.
notes: label: Description (Brief)
content: A glass cylinder, top tipped, with metal disc assembly on bottom. A Transmit-Receive switch for radar units. Donor’s card reads: “T-R tube made by the Sylvania Corporation for the US government in October 1944. Used in radar systems to permit the use of a common antenna for both transmission and reception of pulsed signals. T-R tubes are cavity resonators tuned to the transmitter frequency and are filled to a low pressure with gas. The switching is accomplished automatically by the radio frequency energy itself, the result of the great difference in power between the transmitter pulse and the target echo. The former easily strikes an arc in the tube, whereas the echo lacks sufficient power to cause any gaseous discharge. Consequently, when properly connected in radio frequency circuits, the tube presents either a radio frequency short or a radio frequency open circuit to perform the desired switching functions. Tunable from 8490 to 9600 megacycles.” See also: https://www.radiomuseum.org/tubes/tube_1b24.html.
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.325187
label: catalog number
content: 325187
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: diode
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 1 7/8 in x 1 1/4 in; 11.43 cm x 4.7625 cm x 3.175 cm