A wooden box with a knob on top of it. A dial underneath the knob has labels “1 2 3.22 4 5 6 7.06 8 9.20 11.9”. On this dial there is a also trademark logo “GR”. “1859 A” is inscribed on the top of the wooden box. Underneath the knob there are two metal terminals.
Accession Number: 2009.ph.63
Alternative Name: Variable Capacitor
Primary Materials: Wood, Metal
On the dial is the trademark logo “GR”. “1859 A” is inscribed on the top of the wooden box.
The dial settings are labelled: “0”, “1”, “2”, “3.22”, “4”, “5”, “6”, “7.06”, “8”, “9.20”, “11.9”. The non-ordinal numbers are handwritten on paper labels and applied to the dial with tape. The dial is labelled “01μf/STEP”.
height = 14.5cm, length = 15.5cm, width = 15.5cm
A variable capacitance box is a capacitor that allows you to change the amount of charge that can be stored.
Good. The body of the box is in good condition. The dial surface is somewhat corroded with a white powder on the surface. The hand-made labels are peeling off.
Associated Instruments:
Manufacturer: General Radio Company
Date of Manufacture:
University of Toronto Department of Physics
Additional Information and References:
Historical Notes:
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