MIL-PRF-22 Resistors, Variable, Wirewound, Power Type, General Specification ForThis specification covers the general requirements for power type variable resistors having a resistance element of wire, wound linear on an insulating strip shaped in an arc, such that a contact bears uniformly on the resistance element when adjusted by a control shaft. The power ratings \(see 3.1\) cover a range from 6.25 watts to 1,000 watts, inclusive \(see 6.2\).