RCA-GE model PR-535 rheostat
date: label: date made
content: ca 1921
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: Marked: Box: "Model PR-535 / For Panel or Table Mounting / Series: 6 ohms 1.2 amps. / Parallel: 1.5 ohms 2.5 amps. / For Radiotrons UV200, 201 and 202 and all Standard receiving and 5 Watt Power Tubes. / Manufactured for Radio Corporation of America / By General Electric Co., U.S.A." A variable resistance in original box. Unit consists of a moulded base 2.5" diameter on which are secured two concentric windings held securely in place by clamping screws. Side sweep. Connection is made to these windings by means of two phosphor bronze sliding contacts which form a circuit between the outside and inside windings. Three binding posts are provided by which the resistance coils may be connected in series or parallel according to current requirements. Sale price: $3.00 Reference: RCA Catalog, "Radio Apparatus for Amateur and Experimental Use," 1921, page 30.
label: Location
content: Currently not on view
place: label: place made
content: United States
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.321645
label: model number
content: PR-535
label: catalog number
content: 321645
label: accession number
content: 241556
objectType: label: Object Name
content: rheostat
label: Object Name
content: variable resistance
physicalDescription: label: Measurements
content: unit: 2 7/8 in x 3 1/8 in x 2 7/8 in; 7.3025 cm x 7.9375 cm x 7.3025 cm
label: Measurements
content: box: 2 1/8 in x 3 1/8 in x 2 7/8 in; 5.3975 cm x 7.9375 cm x 7.3025 cm