An electron gun for a color cathode ray tube efficiently modulates magnetic field of a velocity modulation coil. A maximum released power, which a predefined electrical consumer of the motor vehicle may consume, is determined as a function of the weighting value. cm, the crucible containing the material to be crystallized is moved from the crystallization zone to the annealing zone at a speed of 1-3 mmhour, it is first kept in the annealing zone at a holding temperature of 1100-1300 C. The L-shaped supports have a plurality of engagement points so that the step can be adjusted upward and downward using the different attachment points on the gear or ratchet. A strong synergistic effect is observed. Comparison is made between the reference voltage Vref and output terminal voltage Vout by utilizing the ON-state resistances of the output and reference MIS transistors, thus detecting the magnitude of an output current.