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Messages 2245 - 2274 of 2274   Oldest  |  < Older  |  Newer >  |  Newest
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2245
Hi Trev I am glad you like the mould. I got my variac for 50 euros which is about 80 to 90 Aus Dollars. The design of my VDG in the pictures was an old one I...
Elmer Wiersma
elmerwiersma
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May 28, 2008
11:19 am
2246
Hi Trev I just put up 2 more pictures of the mould in further stages of developement. One is with the large gaps filled with epoxy (polystyrene balls filled...
Elmer Wiersma
elmerwiersma
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May 28, 2008
11:35 am
2247
Hi All Because I study at a university I have access to all sorts of scientific articles, I found an article that combined several scientific triboelectric...
Elmer Wiersma
elmerwiersma
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May 28, 2008
7:22 pm
2248
Thanks Trev, The sparks are not quite as fat as in the video, but are still thick enough to be visible in daylight and they do hurt a bit. Todd ... 27/05/2008 ...
Todd Atwood
toddjwood
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May 28, 2008
10:38 pm
2249
Elmer: That's valuable info regarding the nylon. When I built the two VDGs several years ago I must have tried a few varieties until I hit success. Even...
Richard Linder
tibia32
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May 28, 2008
11:06 pm
2250
Thanks Dick, yeah it is a labor of love, it is a hobby so it keeps me busy, it is fun working on something that will help you make a really big sphere...
Elmer Wiersma
elmerwiersma
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May 29, 2008
8:30 am
2251
Elmer That is impressive work you are doing. I hope it all works for you, but i’d love to try and get zapped by that one. I was playing with mine tonight...
Trevor Hannam
trevor_mixie
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May 29, 2008
11:48 am
2252
Thanks Trev ... From: Trevor Hannam To: VanDeGraaffGenerator@yahoogroups.com Sent: Thursday, May 29, 2008 1:47 PM Subject: RE: [VanDeGraaffGenerator] Domes ...
Elmer Wiersma
elmerwiersma
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May 29, 2008
3:17 pm
2253
I found an inexpensive wire basket 10" x 8" x 2.5" at the hardware store and painted PlasticDip around the edge because the binding on the edge was sharp. I...
jthandbook
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May 29, 2008
9:31 pm
2254
great work james, Maybe it arcs from the inside since it is not a sphere like terminal and maybe the electric field sneak in from outside or the large mesh is...
Elmer Wiersma
elmerwiersma
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May 30, 2008
6:52 am
2255
Tod When the mesh sparks from inside does it go directly to the drive shaft of the roller or are you holding a wire inside that is basically earthed. I ...
Trevor Hannam
trevor_mixie
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May 30, 2008
10:34 am
2256
Does anyone have experience with the "water thread" or Wasserfadden experiment? &nbsp; Alan...
alan hallock
alanhallock
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Jun 10, 2008
10:35 pm
2257
... experiment? ... I haven't, but after reading about the experiment I'll tune up the wilmshurst generator and give it a try. There are two outputs of the ...
Philip
pan00
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Jun 12, 2008
4:36 pm
2258
Hello All, I had tried to create a 'solid state' VDG by using a negative Ion Generator. I placed the output inside of a sphere and let it run, but it never...
Todd Atwood
toddjwood
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Jun 16, 2008
5:23 pm
2259
Hi Todd How big is the sphere, it may be that the charge you put in is dissipated by ionisation of the air, which I think will always happen even if there is...
Elmer Wiersma
elmerwiersma
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Jun 16, 2008
6:45 pm
2260
Hi Elmer, I was thinking that unlike the belt which is a continuous DC power supply, the Ion generator most likely uses a multiplier circuit with diodes and...
Todd Atwood
toddjwood
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Jun 16, 2008
9:51 pm
2261
The VDG sphere really is only charging up to the voltage the belt provides, no more... but the belt is a voltage amplifier. Pull two charges apart, the voltage...
Steve
alienrelics
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Jun 17, 2008
2:29 pm
2262
Steve, I would have to disagree with your hypothesis on these three points: 1. If the belt were charging to the full output voltage then the rubber belt I use...
Todd Atwood
toddjwood
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Jun 17, 2008
7:11 pm
2263
... The belt is not charged to the full potential at the bottom. It picks up a few hundred volts, then the physical motion of the belt carries the charge far...
Steve
alienrelics
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Jun 17, 2008
10:59 pm
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...
jacobsmach
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Jun 18, 2008
6:33 am
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...
Todd Atwood
toddjwood
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Jun 20, 2008
1:45 am
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 ...
Trevor Hannam
trevor_mixie
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Jun 22, 2008
6:24 am
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...
Todd Atwood
toddjwood
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Jun 22, 2008
3:20 pm
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, ...
Trevor Hannam
trevor_mixie
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Jun 23, 2008
7:50 am
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...
Todd Atwood
toddjwood
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Jul 5, 2008
11:27 pm
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...
Trevor Hannam
trevor_mixie
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Jul 5, 2008
11:50 pm
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...
Todd Atwood
toddjwood
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Jul 6, 2008
11:31 am
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...
Trevor Hannam
trevor_mixie
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Jul 6, 2008
11:58 am
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...
Philip
pan00
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Jul 7, 2008
4:47 pm
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...
Todd Atwood
toddjwood
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Jul 7, 2008
5:16 pm
Messages 2245 - 2274 of 2274   Oldest  |  < Older  |  Newer >  |  Newest
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