Murdock oscillation transformer
date: label: Date made
content: 1919
name: label: maker
content: Murdock Radio Co.
notes: label: Description (Brief)
content: Murdock oscillation transformer used in amateur station 3BV. A wooden base on which are mounted two coils of flat copper, one smaller than and within the other. Inner coil is 5.75 turns, 5” OD. Outer coil is 7.75 turns, 7” OD. Nameplate reads: “Wm . J. Murdock, Co. / Chelsea, Mass. / San Francisco”. The unit is mounted in a display case with other pieces from station 3BV. Two copper rods have been soldered onto the inner coil, a three-tine piece representing an antenna, and a serpentine piece representing electrical ground. Two other copper rods appear to connect the outer coil of the transformer with the condenser and the rotary spark gap (catalog numbers 325495 and 325497, respectively). Now loose, there are marks indicating they had been firmly attached.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.325494
label: catalog number
content: 325494
label: accession number
content: 252994
objectType: label: Object Name
content: radio transformer
physicalDescription: label: Measurements
content: overall: 3 in x 10 in x 7 1/2 in; 7.62 cm x 25.4 cm x 19.05 cm