Hi There everyone. I was looking at the Dynatron photos and wondering if a guitar sting that had the spiral wrap around the outside would make a decent comb...
Hi All. I became interested recently in all this stuff, at first I was going to build a Wimshurst machine but the Van de Graaff seemed to promise more of a...
Hi John – I am new to this myself sort of and those tourniquets you spoke of will make good rubber belts for a DVG. Also the inner tube of a vehicle has got...
John: Welcome to the group. The Van de Graaff generator replaced the Wimshurst as the electrostatic generator of choice as soon as it was invented in 1935. As...
Paul: One of most important features of a spray comb is that the points be uniform not only in spacing but in distance from the belt. It would seem to me that...
John: The base metal of the sphere is not critical. Surface finish however is. When it comes to creating that infamous involute hole in the sphere that's where...
Hi John The subject of domes is a good one and I have found from my own experience if you can seal the bottom entry against the column with araldite or rubber ...
Hi Richard I was fascinated on this subject of combs and so I had to prove it one way or another. I built 3 combs. One with sharp needles 24 Needles to the...
There are times when you see something that you fall in love with it. Don's little VDG was one. I was so enthralled with it that I had to go and make one. I...
Further to testing the small battery operated VDG, I just had the chance to measure the Current - 2.5 uA. Pretty impressive for such a small unit. I hope to...
Trevor: I am delighted that you like the idea of a little VDG as much as I. You were quick to get your machine built. I can't wait to see the photos. By the...
HI Dick I have made the little VDG but occasionally the belt goes all over the place and will not sit in one spot. If I slow the revs down it does however...
Trevor: Nice job! You've done my little machine one better by making it battery powered. I see you also added a ground plate with an external ground connecting...
Thanks Don, The red and Black connections are for external use of 5 volts, charging the batteries and connecting an external power supply if needed. So far it...
Don In the rocket world an FTC is a fluoro tube cover. They are small plastic covers that go over the standard 36/40 Watt tubes. I think they are supposed to...
Trev: If the belt is at all stretchy I would bet the centrifugal force at that speed is the problem. Dick _____ From: VanDeGraaffGenerator@yahoogroups.com ...
Thanks Dick – I think you are right. I am going to increase the pulley size and drop one battery out of the circuit. That will slow the speed down immensely....
Trevor: Now that I have visited your photo gallery.... It looks like your top roller is not a true right circular cylinder. Maybe that picture is at fault...
will you please take me off your e-mail list ____________________________________________________________________________________ You rock. That's why...
will you please take me off your e-mail list ____________________________________________________________________________________ You rock. That's why...
look at the bottom of page click on blue unsubscribe ... From: geekboy geekboy To: VanDeGraaffGenerator@yahoogroups.com Sent: Saturday, April 05, 2008 11:24 AM...
Trevor, The silver Theraband is the least-stretchy stuff they make. Along with crowning the rollers (making them barrel-shaped, with a larger diameter in the...
Yes possibly Dick, though the picture might be giving a false impression. It is actually cylindrical and taper from centre to end. Like a barrel. I think the...
Hi Don & Richard I didn’t know you could get silver Theraband rubber. I will look for it later as this is only for the small one. I am using Pirelli Rubber...
Trevor: The Boston Museum of Science sprays the belt with, I am told, a 20KV power supply. All rollers are steel. I am not sure of the wiring diagram of the ...
Trev: The silver Theraband is actually gray. It gets it increased stretch resistance through increased thickness, but it's still very thin. Check the files...
Hello Dick, I agree that combs would be best for the larger machines, I was thinking of the little Dynatron that uses a single wire pulled tight, if I am...
Hi, I just joined, thought I'd introduce myself. My name is Phil, I'm from Rhode Island. Last year I got a Wimshurst machine and enjoyed it far more than I...
