An impedance-steerable circuit (40) for an industrial phase controller (200) inserts precise steerable trigger pulses (32) in the sine and cosine excursions of a sine wave of high-energy capacitive and related discharge systems. Multiple pulses and Barkhausen effects are eliminated. The controller (200) can lock capacitive discharge systems (100) into precise phase or, in extended embodiments, serve as a power controller for radar systems, laser systems, and beam weapons. Thyristors (242) and thyratrons provide steered elements (pulses) activated in a pulse-feedback mode.