Sterling model R312 fixed microcondensers
date: label: date made
content: ca 1925
name: label: maker
content: Sterling
notes: label: Description (Brief)
content: Box marked: "Sterling / R-312 Microcondenser / The Sterling Mfg. Co., Cleveland, O., U.S.A." Unit in original box with instruction sheet. An equalizing microcondenser designed for balancing transformers and radio frequency circuits. Unit is essentially a small variable capacitor with two fixed triangular metal plates on one side of a mica dielectric and a butterfly rotor on the other side of the mica strip. Series or parallel variation of plate and rotor connections permit changing of maximum capacitance from 10 to 40 mmf. Reference: instruction sheet.
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.321914.01
label: catalog number
content: 321914.01
label: accession number
content: 241556
objectType: label: Object Name
content: fixed condenser
label: Object Name
content: fixed capacitor
physicalDescription: label: Measurements
content: unit: 1/4 in x 1 5/8 in x 1 in; .635 cm x 4.1275 cm x 2.54 cm
label: Measurements
content: box: 5/8 in x 1 7/8 in x 1 5/16 in; 1.5875 cm x 4.7625 cm x 3.34391 cm