Clapp-Eastham type HRA audio amplifier
date: label: date made
content: ca 1922
name: label: maker
content: Clapp-Eastham Co.
notes: label: Description (Brief)
content: Marked: "1 Stage Amplifier / Type H.R.A. / Clapp-Eastham Co. / Cambridge, Mass." This is a single stage audio amplifier with transformer and 201A tube. Binding posts for input, output, A and B batteries, filament rheostat. Original price was $15.50. REF: "Clapp-Eastham Bulletin", FZ-1922, page 11.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Cambridge
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.320716
label: catalog number
content: 320716
label: accession number
content: 241556
objectType: label: Object Name
content: radio receiver
label: Object Name
content: audio amplifier
physicalDescription: label: Measurements
content: overall: 5 3/4 in x 4 3/4 in x 4 1/2 in; 14.605 cm x 12.065 cm x 11.43 cm