This switched compact unit contains 12 resistors, with preferred values in the range 100 Ohm to 470 Ohm mounted on a printed circuit in a robust black plastic box. Selection is via a rotary switch. External connections are by means of two 4mm terminals. The tolerance of the resistance values is 5% although resistances are commonly closer to their nominal values. All the resistors have a maximum power rating of 1 Watt.
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