http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/ Van de Graaff Generators Tue, 09 Jun 2009 02:27:39 GMT Bert Hickman http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2461 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2461 Hi Paul, This is a bit off topic for this mailing list. You may wish to consider joining the Tesla Coil Mailing List (TCML) at www.pupman.com for extended Mon, 08 Jun 2009 17:23:18 GMT mrapol http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2460 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2460 OK, so now I've seen something I've never heard of or seen before. The simple two post spark gap I made for my bipolar Tesla coil runs hot (not surprising), so Sun, 07 Jun 2009 01:21:17 GMT mrapol http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2459 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2459 Recent developments . . . I fried one of the 20KV Chinese radio capacitors. There was a flash, and the coil went dead. I checked the cap with a meter and it's Thu, 04 Jun 2009 17:45:12 GMT mrapol http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2458 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2458 After tinkering with components for a year, I finally lashed together my first Tesla coil yesterday. Inspired by a design I saw in the Lindsay Pubs. reprint Mon, 18 May 2009 17:19:46 GMT mrapol http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2457 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2457 ... Of course, but I was puzzled why the clock, out of all the appliances and devices in the house, was the only thing affected. I use rabbit ear antennas on Fri, 15 May 2009 22:15:53 GMT dpetersen tds.net http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2456 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2456 Most impressive photos! No wonder you stated "Not good" when someone got across it. A quick mental calculation suffices to remind one of the amount of energy Fri, 15 May 2009 19:40:49 GMT Richard Linder http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2455 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2455 Dan: In my picture collection you can see the "bucket" and all the component parts. See one of my earlier posts (last few weeks) that describes how the bucket Fri, 15 May 2009 19:31:22 GMT dpetersen tds.net http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2454 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2454 A *Five gallon *leyden jar? That should stop a pacemaker at a hundred paces! ... I'll have to build one! Dan Petersen ... A Five gallon leyden jar? That should Fri, 15 May 2009 19:23:11 GMT Khem Caigan http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2453 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2453 ... This is more-or-less the way that radios worked, Once Upon a Time : Spark-Gap Transmitter From Wikipedia, the free encyclopedia http://tinyurl.com/rdgm2x Fri, 15 May 2009 19:22:29 GMT Richard Linder http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2452 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2452 In a 3 wire 220/110 volt household electrical system typically the neutral (white) wire is connected to the ground lug (green wire) in the circuit breaker Fri, 15 May 2009 18:23:53 GMT mrapol http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2451 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2451 ... The oddest example of interference I've experienced was with a digital clock/thermometer. When I run my Van de Graaff downstairs in the kitchen, the Thu, 14 May 2009 23:32:29 GMT acmqsoueu http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2450 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2450 ... A Wimshurst machine produces quite strong electromagnetic pulses when it sparks. An oscilloscope ten meters away can easily register a burst of many volts Thu, 14 May 2009 02:17:37 GMT Todd Atwood http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2449 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2449 Hi Again, I just noticed that the discharges are kind of faint in the new photos page but if you go into my photo album you can see more detail and they are Wed, 13 May 2009 22:49:52 GMT Todd Atwood http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2448 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2448 I just uploaded some pics to my album "Todd's Pics" in response to the request for spark pics. I had a day with relatively low humidity and the longer Wed, 13 May 2009 21:29:13 GMT Richard Linder http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2447 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2447 And that's a LITTLE Wimshurst. Machine. Keep that up and your PC will start doing "funny" things. DL _____ From: VanDeGraaffGenerator@yahoogroups.com