Twin-coupler shield grid tuner
date: label: date made
content: ca 1923
notes: label: Description (Brief)
content: No maker's marking on unit. Box reads: "Shield Grid / 3 Circuit Tuner / Catalog No. 160 / Twin Coupler Co., Inc. / Poughkeepsie, N.Y." A variocoupler-type inductance coil in original box with instruction sheet. Designed to be used in the radio frequency stages of a receiver. Reference: appears similar to a No. 133 Shield Grid (Screen Grid) tuner in the leaflet supplied with the 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.321446
label: accession number
content: 241556
label: catalog number
content: 321446
objectType: label: Object Name
content: variocoupler
label: Object Name
content: variable inductance
physicalDescription: label: Measurements
content: overall: 3 in x 3 3/4 in x 2 3/8 in; 7.62 cm x 9.525 cm x 6.0325 cm