Hi,A cold elecrode tube device, essentially based on the "point and plate" principle, is called "Villard Valve", see:
http://danielgiroux.neuf.fr/page304.htm By good luck I was getting hold of a nice specimen: http://home.datacomm.ch/m.schraner/Villard0696k.jpg http://home.datacomm.ch/m.schraner/Villard0699k.jpg I tested it, and the tube is working fine: http://home.datacomm.ch/m.schraner/Villard0700k.jpgHowever I don't operate it for extended time, in order to avoid exposure to the unknown amount of X-Rax radiation. (Didn't yet try to charge a capacitive device).
Regards, Kurt Sfxneon@xxxxxxx wrote:
In a message dated 8/29/2008 1:52:22 P.M. Central Daylight Time, jhowson4@xxxxxxxxxxx writes:Is it possible to rectifiy a Huge tesla coil? No reason I was just curious.A simple, but not too efficient method to rectify the output of a _large_ coil might be the "point and plate electrode" type of rectifier where a pointed metal rod is aimed at the center of a round metal plate, close enough for ionization to take place. Some rectifying action takes place due to the geometry of the electrodes, and a high DC potential can be accumulated. I'll bet Jeff at Electrotherapy Museum has some examples of this being used for early x-ray tubes, huh Jeff? Tony Greer
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