http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/ Van de Graaff Generators Fri, 25 Jul 2008 02:50:51 GMT mrapol http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2278 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2278 Thanks for the welcome. I found a very good book from Lindsay called "The Boy Electrician," first published in 1940. Loads of great projects and ideas, from Thu, 24 Jul 2008 08:39:47 GMT Trevor Hannam http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2277 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2277 Hi Paul Welcome to the group. You are a tinkerer and like myself, love making things from old parts and scrap. You will find this group most helpful. They Wed, 23 Jul 2008 23:18:48 GMT Richard Linder http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2276 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2276 Hi Paul: Welcome on board! Sounds like you are really on a roll building stuff. Cruise the photo section to see what us folks are up to. Let's see some of Tue, 22 Jul 2008 23:48:37 GMT mrapol http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2275 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2275 Hello all, I'm new to this group and failry new to electrostatics as a hobby. I got started about six months ago when my daughter wanted to make a Leyden jar Mon, 07 Jul 2008 17:16:22 GMT Todd Atwood http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2274 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2274 Hi Phil, It would be nice if we could use this humidity the way nature does, to make electricity. But I think my landlord would frown on thunderclouds in my Mon, 07 Jul 2008 16:47:42 GMT Philip http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2273 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2273 Hi Todd That's the place I got my Wimshurst Generator from. In fact I got one last year, and picked up another this year since as I thought the price was Sun, 06 Jul 2008 11:58:57 GMT Trevor Hannam http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2272 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2272 Thanks Todd I have the Perspex disc now for a year and haven’t done anything with them. Soon now I guess, but they are 6mm thick 13” Diameter. I think Sun, 06 Jul 2008 11:31:31 GMT Todd Atwood http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2271 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2271 Hi Trev, I live in Massachusetts, USA on the coast and while far from tropical we do get our share of moisture so I can sympathize. I forgot to mention that Sat, 05 Jul 2008 23:50:16 GMT Trevor Hannam http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2270 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2270 Hi Todd It has been a while since I have said anything – I feel sorry for people who live in the tropics as you have to pack up your gear for nearly 6 Sat, 05 Jul 2008 23:27:17 GMT Todd Atwood http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2269 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2269 Hi All, Well the humid season has arrived, and it doesn't seem worth it to run any of my devices. Well if any of you were wondering, the demonstration I was Mon, 23 Jun 2008 07:50:51 GMT Trevor Hannam http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2268 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2268 I am a bit like you there Todd. Not actually sure, but you sure can feel that field as soon as you start your machine – even the small ones. The air, Sun, 22 Jun 2008 15:20:08 GMT Todd Atwood http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2267 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2267 Trevor, I don't know so I am only going by observation, but when I run my big (to me) VDG I can feel the e-field expand around the output terminal but as soon Sun, 22 Jun 2008 06:24:26 GMT Trevor Hannam http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2266 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2266 Hi Todd Explanation seems feasible, but I thought that pail effect is that it will continue to increase in voltage until the air ionizes. In that I mean, if Fri, 20 Jun 2008 01:45:52 GMT Todd Atwood http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2265 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2265 Steve, Don and all the members of the group, I would like to say thank you to both Steve and Don for their input, and to say I am sorry to Steve if any of my Wed, 18 Jun 2008 06:33:36 GMT jacobsmach http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2264 http://tech.groups.yahoo.com/group/VanDeGraaffGenerator/message/2264 Todd, Steve and All, Van de Graaff generator operation is through both increased voltage by separation of charged surfaces (the belt and the lower roller) and