C series miniature, regulated high voltage DC to DC converters provide clean and reliable high voltage in a shielded, PC mount package. These modules exhibit very low ripple, noise and EMI/RFI by utilizing a quasi-sinewave oscillator, shielded transformer and excellent filtering techniques. Typical applications include photomultiplier tubes, solid state detectors, electrophoresis, piezo devices, capacitor charging and EO lenses.