Federal type 31 transformer
name: label: maker
content: Federal Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Federal type 31 audio transformer. "Federal Telephone & Telegraph Co. / Buffalo, N.Y. / U.S.A. / Type No. 31 / 500-1000 meters". "Patent Pending." Commercial radio frequency coil covering 500-1000 meters. Connections for plate, grid, +B battery and - filament voltage.
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.241556.497
label: accession number
content: 241556
label: catalog number
content: 241556.497
objectType: label: Object Name
content: transformer
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 1 in; 10.795 cm x 2.54 cm