Voltages of 0 to 30V and 0 to 300V d.c. at up to 60mA. Outputs are fully floating to provide negative voltages if required and are taken from pairs of colour coded 4mm sockets on the front panel. Each output has a continuously variable voltage control, with electronic current limiting circuitry. An indication of the output voltage is given by a graduated scale on each voltage control. A pair of 4mm sockets on the front panel provide 6.3V a.c. at up to 2A for filament heating. An illuminated on/off switch is mounted on the rear panel adjacent to a fused appliance inlet. Housed in a robust metal case with a durable powder coated finish.