Picard military radiotelegraph receiver
date: label: date made
content: c 1915
label: date made
content: ca 1915
name: label: maker
content: Edmond Picard
notes: label: Description (Brief)
content: Marked: "Recepteur Radiotelegraphique / Modele De La / Radiotelegraphie Milituire / Type A1 No. 1289". (Schematic diagram on inside label) English label reads: "Radiotelegraph Receiver Model T.M. 1915 - Type A 9-30-[19]18." (Calibration settings in ink are apparently of this latter date.) Marked on crystal detection unit: "Ed. Picard / Bte S.G.D.G. / Paris. Breuvete SGDG is Sans garantie du gouvernement (patent without State guarantee). This is a French military field receiver designed to cover 100-600 meters through an inductance changing switch and a variable condenser across the secondary. A crystal detector unit mounts across the secondary binding posts. The primary circuit contains a tapped inductance and a variable capacitor. Headphones are supplied along with a spare variable capacitor.
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.320930
label: accession number
content: 241556
label: catalog number
content: 320930
objectType: label: Object Name
content: radio receiver
physicalDescription: label: Measurements
content: overall: 8 1/4 in x 12 1/2 in x 9 in; 20.955 cm x 31.75 cm x 22.86 cm