The non-resonant accelerating system for the KEK-PS Booster accelerator has been constructed. The system has been operating since October 2003 without trouble. The accelerating gap in the system is loaded with magnetic cores of high permeability. The cores produce high resistive impedance at the gap. The power dissipated in the cores amounts to 50kW at 16kV accelerating voltage. It is removed by forced-air cooling system. At the last operation of the accelerator, with the help of new COD- correction system (1), the average beam intensity of the booster increased to 2.8×10 12 ppp, which is 40% higher than before. The circulating beam current at this intensity is 2.7A. A low-pass filter is applied to the anode circuit to extend the operating frequency range. The drive amplifier is class-A push-pull circuit which, with the aid of a grid-bias voltage control, increased the power efficiency to 30%. The superposition of the second- harmonic RF onto this system is also tested.