Thordarson "Universal" transmitting inductance
date: label: date made
content: ca 1932
name: label: maker
content: Thordarson Electric Manufacturing Company
notes: label: Description (Brief)
content: Thordarson transmitting coil in original box. Box marked: "Thordarson Electric Mfg. Co. / 500 W. Huron St. / Chicago, Illinois / Universal Transmitting Inductance / 80-40-20 meter coil / T-7053". Transmitting coil designed for use in amateur radio transmitters. Covers 160, 80, 40, and 20 meters. A helically wound coil of copper tubing 4.5" in diameter each turn of which is joined to the next by means of a specially developed clip. The number of turns chosen for the tank and antenna circuits plus the proper capacitors determines operating frequency. This unit sold for $11.50. Reference: Instruction sheet supplied with unit.
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.321217
label: catalog number
content: 321217
label: accession number
content: 241556
objectType: label: Object Name
content: transmitting coil
physicalDescription: label: Measurements
content: overall: 7 1/4 in x 18 in x 4 1/2 in; 18.415 cm x 45.72 cm x 11.43 cm