This may seem a bit off the wall, and I don't have any pictures of it
(perhaps Bert does) but at a Teslathon hosted by Bert Pool about 5 to 10
years ago I remember we took a standard two tungsten electrode spark gap
mounted on a porcelain base out of a welder, put it in about 1 inch thick
Styrofoam ice cooler and then poured about a gallon of liquid nitrogen on
it. This made for a super fast quench and at -346 F it was self cooling.
If memory serves, the secondary was about 4 foot and we got 6 foot arks
from it. Another interesting affect was because of the UV output of the
gap, when the coil was shut off the liquid nitrogen & cooler fluoresced for
a significant period of time.
Hitby13kw
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