NSTs or MOTs but good luck they smoke out in mere seconds. I built a ballast by winding 500 feet of 10 gauge THHN around a 2 inch piece of PVC and could adjust the current draw by adding or removing welding rods from the inside of the PVC pipe. It worked quite well and had a decent duty cycle but the problem was the pipe would get hot from the rod heading up and it would want to sag. Could build one like that and submerge in oil.
Sent from my iPhone
> On Dec 18, 2018, at 7:57 AM, Daniel Kunkel <dankunkel@xxxxxxxxx> wrote:
>
> Tyler and David,
> Yes, as much as I hate to give up more valuable floor space in the shop to
> another welder, it seems inevitable. I will get one someday, but I am
> waiting for something priced so right, I can't say NO. So in the meantime,
> I just need to scrounge up an additional 3.4 mH of inductance using stuff
> around the shop. Hence the old NST core idea, which is not heavy, does not
> take floor space, and has no additional cost involved.
> ~Dan (streamers on a budget)
> Kansas City area
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