De Forest type D-10 radio receiver
date: label: date made
content: 1923
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: De Forest type D-10 "Reflex" radio receiver. Marked on front panel: "Licensed under / Priess Amplification Inventions / Patents Pending". Decal on top panel: transformer positions for / various frequency bands: / 1350-750 KC / 1000-600 KC / 750-500 KC". Unit mounted in a cabinet with double doors and compartment at bottom. This receiver utilizes a Priess "Reflex" circuit. Four DV-2, DV-6A, or DV-1 tubes are used in a circuit arrangement that gives three radio frequency steps and three audio frequency steps of amplification. The detector is a galena crystal. Plug-in RF coils vary the frequency range. A main tuning condenser and a vernier condenser are on the first panel with filament rheostats and crystal detector adjustment. Filament voltage is 4.5 and plate supply is 67.5. Reference: (Instruction sheet) Operating Instructions for De Forest Portable Reflex Radiophone Receiver Type D-10." Langley Set Index, page 19.
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.320927
label: accession number
content: 241556
label: catalog number
content: 320927
objectType: label: Object Name
content: radio receiver
physicalDescription: label: Measurements
content: overall: 13 1/2 in x 12 1/2 in x 9 1/2 in; 34.29 cm x 31.75 cm x 24.13 cm