Thanks for the tips. I have an old flourescent tube from a copier machine, so I tried having the Wimshurst light it. I had some success, but had to go do some...
I was just reading the history of the double-domed Van de Graaff generator at the Boston Museum of Science. Apparantly the original design had the domes...
The original configuration -- two domes with a vacuum tube beteween them -- never really worked. It was re-purposed as a high energy X- ray generator for MIT....
I was searching Google patents for electrostatic generators and came across a 1991 US patent (link below) for a method of reducing blood glucose using a VDG....
I have a hard time believing this. It seems like quack medicine, like those "violet ray" quack machines. Can you find some publications in medical journals, or...
Steve, When I first saw the patent, I assumed it was a Victorian-age invention that was granted when electricity was promoted as a cure-all. The "violet ray...
... There is a guy who managed to patent several flying saucer propulsion/anti-gravity devices, too. But they are really just high-voltage lifters. ... I hear...
Steve Greenfield Wrote: (snip) ... All your points are valid. I figure that, since no reports of harmful effects of the "hair-raising" VDG demonstration have...
Hi All I have finally been able to make the rollers and the belt and have finished my VDG except for the terminal. I now have a problem that I have the combs...
Elmer: Traditionally the "combs" are located on the same side. That is the bottom comb right where the belt leaves the roller and the top comb right where the ...
Dick I will try to change the position of the top brush. And no I did not try to measure the current with the terminal in place, I have not built the terminal...
Dick I tried to push the amp meters wires to the sides (plastic casing) so they would not touch but still nothing on the amp meter. But when took the top brush...
and some extra info the fluorescent light close to the top roller flashes (can be seen in the dark) as I run the machine. so there is plenty of voltage. ... ...
Elmer you wrote: The machine really is creating 4 inch sparks, well only visible in the dark, ===================================== That's more like corona,...
Dick I tested the battery as basically a volt meter, straight connection to the battery with some wires, I know it is not the right way to do it but I did not...
Dick I finally found what was wrong with the amp meter, the scale of the amp meter is printed on a thin metal sheet and when I removed that the meter worked...
Ok I made a mistake, it is not indicating 60-80 microamps the needle is being attracted to my finger when I hold the other hand close to the belt but the amp...
Elmer you wrote: When I shorted out the amp meter like you said I could not make any sparks, ============================================= If your uA meter is...
Why do you need to test the ammeter? Do you know how to calculate the value of resistor required? With a 1.5V battery, a 50uA meter requires 30Kohms total...
Steve Thanks for the info that saves me some money, the micro amp meters here are about 15 dollars, not a lot but still a simple resistor is much cheaper and I...
Steve and Elmer: I would be concerned with the validity of readings produced by a DMM while in the electrostatic field of a VDG, even without a terminal in...
Dick In the first attempt to use the amp meter I used it on the VDG, like you said shorting out the brushes but I did that while the VDG was running. For some...
Hello All, It has been awhile since I posted but I have built another unit that has a PVC roller on the bottom and a nylon roller on the top to produce a...
... You had also said you connected it directly to a 9V battery. With about 2K of internal resistance, that is about 4.5mA, which is 90 times the rated...
... With the brush shorted by 1K resistance, at 50uA there would be only 50mV, so less electric field would be present than from an AA cell. However, there...
Hi Todd, The initial breakdown voltage (called the corona inception voltage) is lower for a negatively charged terminal than for a similar diameter positively...
Steve and Elmer: You wrote: ============================================== With the brush shorted by 1K resistance, at 50uA there would be only 50mV, so less...
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