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Article #2864Re: Jacob's Ladder
From: Andrew Pettifer
Date: Tue, 14 Apr 1992 22:06
Date: Tue, 14 Apr 1992 22:06
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1769 bytes
From article <1992Apr10.213234.8893@e2big.mko.dec.com>, by pierson@cimill.enet.dec.com (Dave Pierson): > In article <kyZyiB1w164w@inqmind.bison.mb.ca>, magus@inqmind.bison.mb.ca > (James Copland) writes, in part: > >>danube@dirac.physics.sunsyb.edu (Dan Koller*) writes: >> >>> The following works rather nicely, and can be made small. I found an >>> old DEC monitor a year ago, stripped the CRT and threw the rest in the >>> junk box. Recently it occurred to me the HV section probably could be >>> made to work. >>> It's sufficiently powerful to make a 3-4" high Jacob's Ladder, and if you >>> like PC board art, the extra components look kind of neat on this >>> particular board. If it runs in this fashion without burning up for more >>> than 20 min., > A wise precaution. Some HV supplies are not designed for high load > operation. And, as has been pointed out, such things are not quiet, > RF wise. The RF may well peak at a point set by the length of the > electrodes. Some of those frequencies are used by folk who do not take > kindly to emi... > Would using DC reduce in any way the amount of RF generated? Most EHT transformers in monitors nowadays, have an integral HV diode, if you used a Leyden jar to reduce the ripple, and mounted the Jacobs ladder within a steel mesh tube, how quiet would that be do you think?
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Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!goanna!minyos.xx.rmit.oz.au!rxtajp From: rxtajp@minyos.xx.rmit.oz.au (Andrew Pettifer) Newsgroups: sci.electronics Subject: Re: Jacob's Ladder Message-ID: <1992Apr14.170600.29511@minyos.xx.rmit.oz.au> Date: 14 Apr 92 22:06:00 GMT References: <1992Apr10.213234.8893@e2big.mko.dec.com> Organization: RMIT Computer Centre, Melbourne Australia. Lines: 24