Power supply is provided with a continuously adjustable knob for varying voltage from 0 to 5000V, output current 0-2mA, overload protection provided. In build current limiter ensures a long service life of the tubes. Spring contacts is fully insulated fixtures for secure mounting. Provided with fuse protection for primary winding and protection window for tube with red switch for safe operation. Input voltage 0-230V AC, 50Hz. Used with spectrometer experiment.