I inherited an old (probably 1970's vintage) Miller model 250 TIG welder and need to know if there is a way to convert it to a modern type of controller. The fellow I got it from was an electronics genius and designed a foot operated control with a reversible drill and gear reduction box to drive the current setting and trigger the gas, etc. It had a water cooled torch handle that simply dumped into a drain and was regulated by hand.

I want to update it because the old wiring is brittle and the drill needs work. I also want to know if this is worth messing with. It worked great when I used it 20+ years ago.

Any ideas and comments would be appreciated. Thanks.