Columbia type C 05 radio-frequency amplifying transformer
date: label: date made
content: ca 1925
notes: label: Description (Brief)
content: Columbia radio-frequency amplifying transformer in original box. Marked on unit: "Columbia Amplifying Transformer / Type 05 / Pat. Appld. For / Ratio __ to 1 / Columbia Radio Corporation / Chicago, U.S.A." On box: "Columbia Radio Corporation / One / Type C 05 / Long Wave / Radio Frequency / Amplifying Transformer / Made in U.S.A. by / Columbia Radio Corporation / Chicago, U.S.A." A standard RF transformer with terminals for connection to vacuum tube plate, grid, filament, and B+ voltage supply. Solder lugs provided on 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.321463
label: catalog number
content: 321463
label: accession number
content: 241556
objectType: label: Object Name
content: transformer
physicalDescription: label: Measurements
content: transformer only: 3 in x 2 7/8 in x 2 3/8 in; 7.62 cm x 7.3025 cm x 6.0325 cm