Rotary "chopper wheel"
date: label: date made
content: ca 1921
notes: label: Description (Brief)
content: Unmarked with twelve spokes. Rotary chopper commutator wheel designed for use in series with the transmitting key of a vacuum tube transmitter. As it rotates it interrupts the audio frequency feed and modulates the signal. It acts to interrupt the CW signal at an audio rate, and thus imparts a musical tone to the signal which can then be detected by a crystal receiver. Reference: RCA 1922 catalog: "Radio Apparatus for Amateur and Experimental Use," page 33.
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.321638
label: accession number
content: 241556
label: catalog number
content: 321638
objectType: label: Object Name
content: radio component
physicalDescription: label: Measurements
content: overall: 5/8 in x 5 7/8 in; 1.5875 cm x 14.9225 cm