Schindler "build-up" mica condenser
date: label: date made
content: ca 1925
notes: label: Description (Brief)
content: Marked: (box): "Build Up Mica Condenser / Capacity .00025 / Manufactured by / Chas. Schindler / Toledo, O."; (envelope): 20 sheets of mica / 20 sheets of copper / For use in Schindler / Build-Up mica condenser / Patents Pending. / Chas. Schindler / Radio Parts and Specialties / 1401-1403 W. Delaware Ave. / Toledo, Ohio". A .00025 mf, build-up condenser in box, with envelope of 20 sheets of mica and 20 sheets of copper for use in the condenser. This is one set with two parts. Unit comes set for .00025 mfd but the user can add mica and copper plates in order to attain another desired capacitance. Unit consists of a molded hard rubber case with a formica pressure plate, used in conjunction with copper and mica strips so that the experimenter can construct a condenser with capacity varying from .0001 to .006 mfd, depending on the number of plates used. A separate envelope contains mica and copper strips. Unit is designed for service as a grid condenser, radio frequency capacitor, and series antenna condenser. Reference: undated instruction sheet in envelope.
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.321843
label: catalog number
content: 321843
label: accession number
content: 241556
objectType: label: Object Name
content: fixed condenser
label: Object Name
content: fixed capacitor
physicalDescription: label: Measurements
content: condenser: 3/4 in x 2 1/4 in x 1 1/8 in; 1.905 cm x 5.715 cm x 2.8575 cm
label: Measurements
content: envelope: 2 1/2 in x 4 1/4 in x 3/16 in; 6.35 cm x 10.795 cm x .47625 cm
label: Measurements
content: box: 2 3/4 in x 1 5/8 in x 1 in; 6.985 cm x 4.1275 cm x 2.54 cm