Resistance Substitution Box

Resistance Substitution Box is a convenient instrument for determining the desired resistance values in circuits under design or test. This resistance substitution box has 12 different values 100 ? , 220 ? , 470 ? , 1 k? , 2 k? , 4 k? , 10 k? , 22 k? , 47 k? , 100 k? , 220 k? and 470 k? . All resistors are precision 1% resistors and are of 1 watt rating. Selected resistor can be attached in any circuit with 4 mm two red safety sockets.