Federal "Ortho-sonic" power supply
date: label: date made
content: ca 1923
name: label: maker
content: Federal Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Serial number 12920, 60Hz. Green metal case, 6 screened ventilating holes in top. Designed to provide A, B, & C voltages for battery operated radio receivers from 110 volt, 60 cycle alternating current supply. Latest patent listed on nameplate is US 1426754, "Circuits for Electron-Discharge Devices," issued 22 August 1922 to Robert C. Mathes.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Susan Horle
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314192
label: catalog number
content: 314192
label: accession number
content: 195337
label: serial number
content: 12920
objectType: label: Object Name
content: Power Supply
label: Object Type
content: power supply
label: Other Terms
content: Power Supply; Components; Radio and Television; Radio and Television
physicalDescription: label: Measurements
content: overall: 9 in x 8 in x 21 in; 22.86 cm x 20.32 cm x 53.34 cm