A starter is provided for a self-oscillating radio frequency oscillation circuit for high-power applications used for plasma generation in an ICP emission spectrometer or for other purposes. A secondary winding of a starting transformer is arranged in an LC resonance circuit including an induction coil, capacitor and other elements. A starter, e.g. a Clapp oscillator circuit, is connected to a primary winding magnetically coupled with the secondary winding. A radio-frequency current is induced in the LC resonance circuit by energizing the starter for a certain period of time in a starting phase. As a result, electric current flows through the secondary windings in a full-bridge drive circuit which are magnetically coupled with primary windings, whereby voltage is developed between the gate and source of MOSFETs, causing these MOSFETs to begin an ON/OFF operation, whereby the self-oscillation is started.