Clapp-Eastham "Radak" type HR radio receiver
date: label: date made
content: ca 1923
name: label: maker
content: Clapp-Eastham Co.
notes: label: Description (Brief)
content: Marked: "Regenerative Receiver / Type H.R. / 175-825 M / 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." Regenerative detector using 201-A type tubes. "Radak" stamped no faceplate. Antenna condenser and tickler coil controls are located on front panel together with a filament rheostat. Connections on panel for antenna, ground, filament battery, and headphones. Plate battery connections are made inside unit. Original price: $40.00 REF: "Langley Set Index", page 15. "Clapp-Eastham Bulletin" FZ-1922, p. 3.
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.320727
label: patent number
content: 1113149
label: catalog number
content: 320727
label: accession number
content: 241556
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