Clapp-Eastham type D receiving transformer
date: label: date made
content: 1920
name: label: maker
content: Clapp-Eastham Co.
notes: label: Description (Brief)
content: Clapp-Eastham type D receiving transformer. Marked: "Clapp-Eastham". Weight: 7 pounds. This unit employs a marble base and hard rubber panel. This is a toroidal type tuner with outer knob varying primary inductance by means of a sixty point rotary switch. Inner knob varies secondary inductance by means of a thirty point rotary switch. Center knob varies coupling between primary and secondary. Wavelength range is 200-2000 meters. Reference: William B. Duck Co. Catalog No. 14, 1920, page 52.
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.320845
label: accession number
content: 241556
label: catalog number
content: 320845
objectType: label: Object Name
content: radio component
label: Object Name
content: receiving transformer
physicalDescription: label: Measurements
content: overall: 6 3/4 in x 6 in x 8 in; 17.145 cm x 15.24 cm x 20.32 cm