Original poster: Mddeming-at-aol-dot-com In a message dated 9/11/03 2:29:02 PM Eastern Daylight Time, tesla-at-pupman-dot-com writes: What's wrong with applying 140V to an NST through a Variac? Gary Lau MA, USA Hi Gary, All, It's not wrong per se. It's just like winding out the family car to 12,000 rpm. I wouldn't recommend it to a newbie driver. Matt D.