tuning helix
date: label: date made
content: ca 1915
notes: label: Description (Brief)
content: Unmarked tuning helix with 53-turn helix, three loose turns on top of unit. External clips on coils vary inductance. Coil used in amateur radio transmitters of the 1915 period. Coils are 6" diameter.
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.321215
label: catalog number
content: 321215
label: accession number
content: 241556
objectType: label: Object Name
content: tuning helix
physicalDescription: label: Measurements
content: overall: 10 1/4 in x 6 in x 6 in; 26.035 cm x 15.24 cm x 15.24 cm