U.S. Army Signal Corps "phantom antenna"
date: label: date made
content: 1918
label: date made
content: ca 1918
name: label: maker
content: General Radio Company
notes: label: Description (Brief)
content: Marked: "Signal Corps, U.S. Army / Phantom Antenna / Type 147D / Date Feb. 27, 1918 / Order 41714 / M.F. .0004. OHMS 6 / Natural Period 335 [lambda] / General Radio Co. / Cambridge, Mass." Unit is a coil-capacitor "dummy load" designed to simulate the electrical characteristics of an antenna tuned to resonate at a wave-length of 325 meters. Intended for use in testing and maintenance when actual radio transmissions using a real antenna are not desired. Panel is of bakelite with two binding posts for connection to external circuit.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Cambridge
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.321460
label: catalog number
content: 321460
label: accession number
content: 241556
objectType: label: Object Name
content: antenna component
physicalDescription: label: Measurements
content: overall: 3 1/4 in x 5 in x 2 1/2 in; 8.255 cm x 12.7 cm x 6.35 cm