A hybrid puise generator capable of supplying advance and prime pulses for 50-bit magnetic logic circuits is described. The device can operate on the low supply voltages used with transistor circuits. Saturable reactors and semiconductors are used as switches to control the charging and discharging of capacitors in this circuit to generate short-duration, high-current pulses. Temperature tests showed satisfactory operation over a temperature range of -- 55to 85 un. Concent 85% C. A step-by-step design of a typical unit is presented. (auth)