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Re: Off topic Jacobs ladder qustion



Original poster: David Speck <dave@xxxxxxxxxxxxxxxx>

Brad,
Acrylic tube would be a bad choice, 'cause if the arc were to get close to the tube, it could "catch" and set the acrylic on fire. Not a good outcome.


Several options for opening the bottom of a glass vase (assuming it's nothing too precious). Old technique was to score a deep groove where you want to separate it, and put a nichrome wire into the groove, heat it electrically, and the thermal shock should theoretically snap off the base along the line. Unfortunately, it might take a few tries to make it work exactly as you want.

These days, you can buy a diamond coated wheel for cheap at Harbor Freight tools and very slowly and carefully cut off the base, preferably under a continuous stream of water for cooling. They even make small wheels that you could use in a hand held Dremel tool, but you would have to keep the water out of the tool.
Dave


Tesla list wrote:

Original poster: "bmcpeak" <bmcpeak33@xxxxxxxxxxx>

Hello, Group,
While working on my Coil I am building a Jacobs ladder ( need a HV fix :)
My question is ... I have located some large O.D. Glass Vases to use for a tube for the electrodes. But I want to cut the bottom off of the vase, can anyone give advice on doing this to a round object. As last resort I could drill holes for the electrodes. Or use an acrylic tube but how likely would this material be to melt?
Brad McPeak