General Electric Mark II aircraft radiotelephone set
date: label: date made
content: c. 1918
label: date made
content: ca 1918
name: label: maker
content: General Electric Company
label: maker
content: Western Electric
notes: label: Description (Brief)
content: Marked on transmitter: "Telephone Wireless Aircraft / MK II / Transmitter / No. A/649. / General Electric Co., U.S.A. / No. 17988-A"; on microphone: "Western Electric D14293 / Pat. in U.S.A. Jan. 14-[19]13 / Pat. applied for." Specimen is a field type aircraft telephone transmitter employing "plug-in" sections. A transmitter unit is provided, together with a meter, telephone headset, microphone, and connecting cables. Meter unit measures current to 0.5 amperes. Transmitter is a two-valve triode type. Specific tube is not known, but presumably could be OSRAM 4-prong triode valves.
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.321088
label: catalog number
content: 321088
label: accession number
content: 241556
label: model number
content: Mk-II
objectType: label: Object Name
content: radio transceiver
physicalDescription: label: Measurements
content: box: 8 in x 21 1/2 in x 16 in; 20.32 cm x 54.61 cm x 40.64 cm
label: Measurements
content: meter: 5 3/4 in x 3 3/4 in x 1 1/4 in; 14.605 cm x 9.525 cm x 3.175 cm
label: Measurements
content: transmitter: 6 1/2 in x 9 1/2 in x 6 in; 16.51 cm x 24.13 cm x 15.24 cm