QRS "Redtop" radio signal detector / amplifier in original box
date: label: date made
content: ca 1927
name: label: maker
content: QRS Music Company
notes: label: Description (Brief)
content: QRS "Redtop" radio signal detector and amplifier in original box with instruction sheet. A 4-pin plastic base, short pins, tipless T-shaped envelope with red dyed top. Getter stain has silvered envelope. Decal on envelope"QRS". Instruction sheet has a $2.50 price listed. Company bought by Raytheon in 1928. Reference: Tyne, "Saga of the Vacuum Tube," page 361.
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.320919
label: catalog number
content: 320919
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: composition (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: paper (box material)
label: Measurements
content: overall: 4 in x 1 1/4 in; 10.16 cm x 3.175 cm