A programmable high-voltage ac supply with a load power of up to 3 kW is described. The frequency range is 10-200 kHz. The maximum output voltage is 6 kV. The power supply is designed for use in ac gas-discharge lasers. It employs a variable lowpower generator and a high-power high-voltage amplifier. This permits variation of the supply parameters and the outputcurrent shape and program control by a computer. The variable generator is installed in a CAMAC crate.