The TSN75A 7.5kV Power Supply is a current-limited transformer based AC voltage source with resistively-damped output coupling which provides enhanced load (i.e. ionizing apparatus or Applicator) regulation. This enhanced stability versus a large range of loads results in improved reliability and longevity of both the supply and the load (Patent Pending). The TSN75A includes an input dual-voltage selector switch to support operation with a multitude of international mains power systems (e.g. 100V…120V and 220V…240V at 50Hz or 60Hz).