I made a jacob's ladder with a 2 MOT stack, inductive ballasted to 40 mh shorted, bare 4ga wire electrodes, 13.9 Mohm Gabriel electrode (yeah, I know that's too much). If you were wondering, I wear sunglasses and I have some experience, though not with rising arcs. Anyway, depending on how I bend the electrodes, the dang arc either won't start, won't rise, or will rise until it is about 1/2 inch long and then die, for no apparent reason, in a spot with the electrodes diverging only slightly. Same things in an open and a closed garage. Compared to my tesla coil with similar current draw, it is incredibly lame. I'm feeling glad I went with the simple thing instead of my originally planned audio modulated solid state one.
17 years ago