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Re: [TCML] Variable Ballast



Check out the old Miller Thunderbolt AC welders. Some, like mine, have a crank handle on the top that raises / lowers a shunt into / out of the transformer core. Works great with either my 14.4 KV pole pig or my 125 KV @ 300 mA X-Ray transformer. Welder secondary shorted, primary in series with the HV xfmr primary. The X-ray transformer is fed 280 volts from a 1256D variac. I can run it for about 1 minute @ 56 amps before the core on the variac gets uncomfortably warm. Makes for a kick butt Jacobs ladder!

Bob


On 7/1/2015 2:14 PM, Miles Mauldin wrote:
Do I need to find an old welder, or will an inexpensive new one work just as well. Read many posts about shorting the secondary and using the primary in line with a pole pig. Thoughts, ideas or suggestions all wanted for a variable ballast.



View item:
110V Arc Welder 100 Amp Rod Stick Welding Kit w/ Mask & Chipper Brush FREE SHIP!

Miles
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