Section of De Forest radio receiver
date: label: date made
content: ca 1922
name: label: maker
content: Dr. Deforest
label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Marked: "De Forest / Wireless / System / Radio Telephone And Telegraph Apparatus." Section of De Forest radio receiver. Front panel of receiver with attached controls, induction coil, and rheostat. No casing. One connecting wire is disjoint and stored with the unit. Variable capacitance is missing. A 3.5" diameter coil is the tuning element with two sliders adjusted by knurled knobs on the panel. A honeycomb coil can plug in on the top of the panel. Tube is missing but appears to be a De Forest VT type. Filament rheostat for adjusting filament voltage. Binding posts for batteries are located on the rubber panel.
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.321157
label: catalog number
content: 321557
label: accession number
content: 241556
objectType: label: Object Name
content: radio receiver
physicalDescription: label: Measurements
content: overall: 9 1/8 in x 8 in x 5 3/4 in; 23.1775 cm x 20.32 cm x 14.605 cm