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Hey all I have been working on a small size SGTC, and have posted a few doubts regarding capacitors previously on the mailing list. I also have a few doubts regarding the Spark Gap of my coil. I am planning to use a Tungsten welding electrode (TIG) for the spark gap. It comes in rods of dia 2.4mm and length 150mm. I am planning to cut the rod into 4 pieces and use them for the spark gap. I wanted to ask whether it is absolutely compulsory to smooth the edges of the rod, and make them hemispherical at the end after i cut it into pieces, or it will be ok to just use the flat sides in the spark gap. Also, I wanted to ask if anybody has ever used Aluminium balls for making a spark gap, and what are the pros/cons for the same? Thanks Ayush sharma ᐧ _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla