Antique Oak Bakelite Brass Electrical Resistor Resistance Decade Box 8"


$80.00

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Description

Early 20th century scientific electrical resistance / resistor box. Wood body with Bakelite top; 13 brass pins marked 1 to 1000 in progressively increasing increments; two terminal posts.

"A decade box is a piece of test equipment that can be used during prototyping of electronic circuits to substitute the interchanging of different values of certain passive components with a single variable output. Decade boxes are made for resistance, capacitance, and inductance, the values of which can be adjusted incrementally by the turning of a knob or switch, with the contacts of the switch moving along a series of the respective components. The interface for these devices usually consists of dials or adjustable tape counters, and they are operated in-circuit and without any external power source." (Source: Wikipedia)

Condition

Good Overall - Gentle wear

Dimensions

7.75" x 4.25" x 5.25" (Width x Depth x Height)