De Forest interpanel radio receiver
date: label: date made
content: ca 1921
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Marked: panel 1: "De Forest Inter-Panel Set / One Step Amplifier / Type MP-200"; panel 2: "De Forest Inter-Panel Set / One step amplifier Type MP-200"; panel 3: "De Forest Inter-Panel Set / Audion Control Panel / Type MP-100 / panel 4: De Forest Inter-Panel Set / Multi-Wave Tuner / MT-200". Unit appears to be a tuner, detector and two stage audio amplifier. Primary and secondary condenser tuning provided on tuner with switch to connect primary capacitors in series or shunt across the plug-in honeycomb coil unit. One gear in the coil base no longer functions. Audion control box has filament current rheostat and tap switch to vary plate voltage. Audio amplifiers have filament rheostats. Original price: $125.00. REF: "Clymer-Greenwood", page 23. For tuner: De Forest Catalog D (1920) page 32. Clark collection: SRM 15-034.
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.320781
label: catalog number
content: 320781
label: accession number
content: 241556
objectType: label: Object Name
content: Receiver
label: Object Name
content: radio receiver
label: Other Terms
content: Receiver; Radio
physicalDescription: label: Measurements
content: overall: 9 3/4 in x 29 1/4 in x 7 3/4 in; 24.765 cm x 74.295 cm x 19.685 cm