General Radio type 338 string oscillograph
date: label: date made
content: 1930
name: label: maker
content: General Radio Company
notes: label: Description (Brief)
content: Nameplate reads: "String Oscillograph / Type 338 Serial No. 292 / General Radio Co. / Cambridge, Mass." Supplied with two string holders and an accessory kit. Old exhibition label reads: "Variations in electrical current cause a wire (string) to deflect. A bright lamp reflects the image of the wire from the rotating mirror onto the screen. This is one of the last models designed before cathode ray oscilloscopes became standard laboratory equipment." Accessory kit contents: envelope containing extra wire ("0.0004" wire / for type 338-A"; "Caution" card; "Parts removed from string holder blade" tag; coiled power cord; coiled connecting cord; stoppered bottle with brown residue; burned-out Mazda miniature lamp with optical envelope; three twisted wire frames; two unmarked control boxes; unmarked piece of wood with two machine screws; extra machine screw with two flat washers; small machine screw with clamp.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from the University of Redlands, thru Gray Ward
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323576
label: catalog number
content: 323576
label: accession number
content: 251306
objectType: label: Object Name
content: Oscillograph, String
label: Object Name
content: oscillograph
label: Other Terms
content: Oscillograph, String; Measuring Devices
physicalDescription: label: Measurements
content: overall: 14 in x 30 in x 8 1/2 in; 35.56 cm x 76.2 cm x 21.59 cm