Wireless Speciality type IP-175 crystal radio receiver
date: label: date made
content: ca 1913
name: label: maker
content: Wireless Specialty Apparatus Co.
notes: label: Description (Brief)
content: Marked: "Wireless Specialty / Apparatus Co., New York / Type +P-175 [sic] / No. 135". Type IP-175 crystal radio receiver. Crystal detector cup adjustable under a fixed point by means of a micrometer mechanism actuated by two knobs. Binding posts are provided on the hard rubber panel for tuner, battery and telephone connectors. A three point On-Off-Bat. switch is mounted on the panel. Unit could use a crystal element of silicon and antimony, or antimony-arsenic alloy. Reference: Clark Collection, SRM 50-031A and SRM 50-038.
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.321301
label: catalog number
content: 321301
label: accession number
content: 241556
objectType: label: Object Name
content: Detector
label: Object Name
content: radio receiver
label: Object Name
content: crystal radio
label: Other Terms
content: Detector; Radio
physicalDescription: label: Measurements
content: overall: 3 1/2 in x 7 5/8 in x 6 3/8 in; 8.89 cm x 19.3675 cm x 16.1925 cm