U.S. Army Signal Corps type SCR-68 aircraft radio transceiver
date: label: date made
content: ca 1918
label: date made
content: 1918
label: associated date
content: 1918
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: Western Electric / U.S. Army Signal Corps type SCR-68 aircraft radio transceiver. Marked: "Signal Corps U.S. Army / Airplane Radio Transmitting / and Receiving Set / Type SCR 68 / Order # W40899 / Serial No. [blank] / Made by Western Electric Co., Inc." Top plate: "Patented in U.S.A." with dates as follows: 12/2/1902, re 8/4/1903, re 8/25/1903, 8/16/1904 x 4, 10/31/1905 x 2, 4/17/1906 x 2, 2/18/1908, 6/6/1911, 7/14/1914, 3/2/1915, 2/8/1916, 10/17/191, re 10/23/1917, and "Patents applied for." Paper tag: "June 18, 1918". Five triode tubes are employed in a circuit in which two VT-2 power tubes are used in the transmitter section and three VT-1 tubes in the receiver section. A ballast lamp is connected in series with the filament circuit of the VT-2 tubes and functions as an additional regulator. A large oval shaped antenna inductance coil is installed internally and contains a number of taps which are connected to contact points of dial switches mounted on the panel. The antenna coil is used for both transmitting and receiving. Navy equivalent of this unit was the CW 1055. Unit installed in wooden case. Unit includes a power cord, box of mounting hardware, and fuse inside. Good schematic of installation and auxiliary parts is inside the lid. Patent dates range from 2 December 1902 to 18 June 1918. Reference: SCR Pamphlet No. 20 (4-20-18); "SCR-68 Airplane Radio Telephone Set," (Clark Collection: CWC 76-48A).
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.320878
label: catalog number
content: 320878
label: accession number
content: 241556
objectType: label: Object Name
content: radio transmitter
label: Object Name
content: Transceiver
label: Object Name
content: radio transceiver
label: Other Terms
content: Transceiver; Radio
physicalDescription: label: Measurements
content: overall: 11 1/2 in x 18 1/2 in x 6 1/2 in; 29.21 cm x 46.99 cm x 16.51 cm