Martian "Big Four" crystal radio receiver
date: label: date made
content: 1923
name: label: maker
content: Martian Manufacturing Co. Inc.
notes: label: Description (Brief)
content: Marked: "Martian / Big Four / Newark, New Jersey / Pat. Pend.". A crystal radio detector with binding posts for headphone connections on top, posts for antenna and ground connections on bottom. Crystal element intact. Coil is wound on hexagonal form with two rolling sliders for changing inductance. Entire unit mounts on a tripod stand. Crystal detector is of the "cat's whisker" type. Made by Martian Manufacturing Co. Inc. Original price: $7.00. Reference: https://www.radiomuseum.org/r/martian_big_4_1.html.
label: Location
content: Currently not on view
place: label: place made
content: United States: New Jersey, Newark
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.321394
label: accession number
content: 241556
label: catalog number
content: 321394
objectType: label: Object Name
content: radio receiver
label: Object Name
content: crystal radio
physicalDescription: label: Measurements
content: overall: 9 1/2 in x 5 in; 24.13 cm x 12.7 cm