EHT Unit 6,000V - PSU Base. The PSU Base EHT unit features centre tapped terminals to deliver 3kV - 0 - 3kV output. The output is continuously variable from 50V to 6kV. Current is limited to 2 milliamps across the main terminals for safety. Additional 60 microamp terminals are also provided for use in some experiments. In addition a heater output of 6.3V AC at 2A is provided. Output is shown on a large LED digital display. The EHT circuits are fully floating and so may be connected to earth, as required for some applications. The unit is housed in a metal case and is powered by an adapter with 100-240V AC universal voltage (supplied). Designed and manufactured in the UK with 5 year warranty.