Xref: utzoo sci.electronics:6342 sci.physics:8318 Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!husc6!frooz!cfa.HARVARD.EDU From: willner@cfa.HARVARD.EDU (Steve Willner) Newsgroups: sci.electronics,sci.physics Subject: Re: HV Cap Fun! Message-ID: <109@cfa.HARVARD.EDU> Date: 29 May 89 17:36:49 GMT References: <3806@mit-amt> Sender: news@cfa.HARVARD.EDU Followup-To: sci.electronics Lines: 18 From article <3806@mit-amt>, by rdsnyder@mit-amt (Ross D. Snyder): > A word of caution: The HV supply and caps were in a steel cabinet --no doubt carefully grounded-- > with safety interlocks on the access panels. The relay was in > another steel box within the cabinet and had an interlock on its > door. Don't just throw together a kludge. If you're going to > build one of these, do a good job and insulate everything and use > HV wire, lots on silicone sealant, and bleeder resistors across > your caps. The above is absolutely right; pay attention! And one more: Make sure you have a fiberglass stick, a couple of feet long, with a well-grounded contact on one end. As soon as you open a cabinet, grasp the stick (by the end _opposite_ the ground!) and touch the ground to every terminal of every capacitor. Normally this does nothing, but it produces an interesting :-) effect if any of your bleeder resistors has gone bad or if you left the power on and your interlock has failed.