Universally applicable, floating, high-voltage source for operation of electron tubes. With built in, high voltage resistant transformer to supply the heater voltage for electron tubes. Continuously adjustable high voltage, safe to touch, with passive current limitation and digital voltage display. High voltage output: 0 - -5000 volts DC, max. 2 mA. Heater voltage output: 6.3 volts AC, maximum 3 ampere, high voltage resistant up to 6 kilovolt. Overload protection: Primary: fuse. Secondary: current-limiting resistors. Connections: 4mm safety sockets. High-voltage display: Analogue. Dimensions: 235 x 130 x 155 cubic millimeters approx. Weight: 3.5 kilograms approx. 115 Volts.