Federal type 30 amplifying transformer
date: label: date made
content: 1923
name: label: maker
content: Federal Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Federal type 30 amplifying transformer. Markings: "Type No. 30 / 275 to 600 Meters / Federal Telephone & Telegraph Co. / Buffalo, N.Y., U.S.A. / Patent Pending." A standard RF [radio frequency] transformer covering 275 to 600 meters and assembled in a hard rubber shell. A bakelite mounting block carries springs into which interchangeable transformers may be slipped. This RF coil recommended for use with UV-200 and 201 vacuum tubes. Reference: Federal Bulletin 102-W, February 1923, page 10.
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.321772.01
label: catalog number
content: 321772.01
label: accession number
content: 241556
objectType: label: Object Name
content: transformer
physicalDescription: label: Measurements
content: overall: 1 3/4 in x 4 1/4 in x 1 5/8 in; 4.445 cm x 10.795 cm x 4.1275 cm
label: Measurements
content: coil: 3 3/16 in x 1 3/16 in; 8.09625 cm x 3.01625 cm