ERLA ratio 3.5 to 1 audio transformer
date: label: date made
content: ca 1925
notes: label: Description (Brief)
content: Manufacture: Electrical Research Laboratories. Plate reads: "Radio Frequency Transformer / Ratio 31/2 to 1 / Electrical Research / Laboratories, Chicago". A standard audio transformer with four binding posts.
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.322433
label: catalog number
content: 322433
label: accession number
content: 241556
objectType: label: Object Name
content: transformer
physicalDescription: label: Measurements
content: overall: 2 3/4 in x 1 3/4 in x 2 1/2 in; 6.985 cm x 4.445 cm x 6.35 cm