U.S. Army Signal Corps type BC 8-A radio receiver
date: label: date made
content: ca 1920
name: label: maker
content: Wireless Improvement Company
notes: label: Description (Brief)
content: Marked: "Signal Corps U.S. Army / Set box Type BC-8-A / Radio-Audio Frequency Amplifier / 1000 Meters D.W. Serial No. 115 / Order No. 130984 Date: June 1920 / Made by Wireless Improvement Co. / New York, U.S.A." On tag: "Wireless Improvement Company / 66 York Street / Jersey City / Passed Tests 5/26/21 / Serial No. 115." Unit is designed to receive damped waves, but CW signals can be received with the aid of an external heterodyne. Six VT-1 tubes are employed in a circuit consisting of three untuned RF stages, a detector, and two stages of audio. Amplification is greatest in the range of 1000 meters. Terminals and control handles are mounted on a bakelite panel. Battery binding posts are included for a 4 volt filament battery and 40 volt plate battery. Provision is made for reducing amplification by cutting out the final audio stage. Control handles include an on-off filament battery switch, and a rotary filament rheostat switch. Reference: Clark Collection: CWC0510284A. Signal Corp Pamphlet No. 9: "Amplifier and Heterodynes," Dec. 1921, pages 8-10.
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.320949
label: catalog number
content: 320949
label: accession number
content: 241556
label: serial number
content: BC8-A
objectType: label: Object Name
content: radio receiver
label: Object Name
content: receiver, radio
physicalDescription: label: Measurements
content: overall: 8 3/8 in x 15 1/4 in x 4 1/2 in; 21.2725 cm x 38.735 cm x 11.43 cm