Clapp-Eastham type HR radio receiver
date: label: date made
content: ca 1922
name: label: maker
content: Clapp-Eastham Co.
notes: label: Description (Brief)
content: Marked: (Plate) Regenerative Receiver / Type H.R. / 175-825 Meters / Clapp-Eastham Co. / Cambridge, Mass. / Licensed under Armstrong U.S. / Patent 1113149, Oct. 6, 1914. / For Use in Amateur Experimental and Scientific School Radio Stations." "Radak" not stamped on faceplate. Regenerative detector employing a 201A type triode. Tube & socket are missing from specimen. Controls include antenna condenser, tickler coil, filament rheostat, and antenna inductance. Connections available for antenna, ground, filament battery connection made inside unit. Original price $40.00. Wavelength range 180-825 meters. REF: "Langley Set Index", page 15; "Clapp-Eastham Bulletin" FZ-1922 pp. 3-4.
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.320832
label: accession number
content: 241556
label: catalog number
content: 320832
objectType: label: Object Name
content: radio receiver
physicalDescription: label: Measurements
content: overall: 9 1/4 in x 8 in x 6 in; 23.495 cm x 20.32 cm x 15.24 cm