Marconi type 106 radio receiver
date: label: date made
content: c 1917
label: date made
content: ca 1917
name: label: maker
content: Marconi Wireless Telegraph Co. of America
notes: label: Description (Brief)
content: Marked: "Marconi Wireless Telegraph Co. of America / Type 106 Catalog No. 3171 / Serial no. 516 / Patented: 6-4-01; 6-28-04; 12-4-06; 11-14-11 / Range Wave Lengths: / 200 Meters to 3500 Meters / Date: 8-17-17 / Mfd. Under Patents of National / Electric Signaling Co. and / Marconi Wireless Telegraph / Co. of America, Licensee. / Licensed Only for Use Authorized By Contract of Sale." This unit is essentially a crystal detector with series tuned primary and parallel tuned secondary. The detector element is actually mounted in vertical position on the front panel. The antenna circuit can be tuned to wavelengths shorter than the resonant wavelength of the antenna by using the series variable capacitor. Inductance of the primary winding is changed through use of two multi-point switches. Coupling between primary and secondary windings is varied with a rack and pinion adjustment. REF: E.E. Bucher, "Practical Wireless Telegraphy" (London: Wireless Press, Inc., 1921): 151-154.
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.320706
label: serial number
content: 516
label: catalog number
content: 320706
label: accession number
content: 241556
objectType: label: Object Name
content: radio receiver
physicalDescription: label: Measurements
content: overall: 11 in x 21 in x 9 in; 27.94 cm x 53.34 cm x 22.86 cm