Murdock model 424 oscillation helix
date: label: date made
content: ca 1915
name: label: maker
content: Murdock Radio Co.
notes: label: Description (Brief)
content: Marked: "Wm. J. Murdock Co. / Chelsea, Mass." Murdock model 424 oscillation helix for an amateur radio transmitter. The fixed coil (4.75" diameter) is almost six turns and the hinged coil (7" dia) is nearly 8 turns. Coils are made with copper stripping. Reference: Murdock catalog no. 15.
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.321421
label: catalog number
content: 321421
label: accession number
content: 241556
objectType: label: Object Name
content: radio helix
physicalDescription: label: Measurements
content: overall: 9 in x 10 in x 7 1/2 in; 22.86 cm x 25.4 cm x 19.05 cm