audio amplifier unit
date: label: date made
content: c 1922
label: date made
content: ca 1922
notes: label: Description (Brief)
content: No maker's mark. Unit normally employs eight tubes of the 201A type (missing). Eight filament rheostats are mounted on the panel. Two 2.5" diameter holes are cut on the front panel. Six audio transformers are used for interstage coupling. This specimen is a comparison unit to catalog number 320797.
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.320798
label: catalog number
content: 320798
label: accession number
content: 241556
objectType: label: Object Name
content: audio amplifier
physicalDescription: label: Measurements
content: overall: 8 1/4 in x 40 in x 9 in; 20.955 cm x 101.6 cm x 22.86 cm