The Extech 380405 Capacitance Decade Box is very popular for product design testing and calibration because it can be substituted into a circuit and function in the place of any component with a standard value quite easily. Alternatively, it can also be used to identify the best value for circuit operation and then read that value from the switches. Then, a capacitor of the size indicated by the decade box switches can then be put into the circuit.
The concept of the decade box works well with a number of component types, greatly accelerating the trial and error process. However you are likely to find that the arrangement of switches can vary. This device measures 4.6 x 5.7 x 1.4" (H x W x D), and the case may be grounded separately. Three binding posts permit isolated substitutions. The 380405 comes with a one-year limited warranty.
Designed in 1930 by the Swedish Bofors Company, this gun was adopted by some 18 countries and became the standard light Anti aircraft weapon with the British forces.
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