Hi Everyone,I had been entertaining the idea of using magnets as the top roller.The reason was a discovery last year in which I used neodymium magnets...
2594
mebikerider
Jul 20, 2011 4:40 pm
I've never heard of magnetism having anything to do with Van de Graaf operation; I suppose they'd slightly alter the paths of mobile charges but I can't think...
2595
turner_chris1
Aug 7, 2011 3:27 pm
The shake-sphere device shown in AD Moores book, but not explained, intrigues me? How does it work? I have seen the explanation by ...
2596
GlenR
grayco4
Aug 12, 2011 11:09 pm
In the files section, under "Grayco4's ideas, there is a drawing, titled "vdgII.bmp". I want to build an influence machine utilizing the Leyden Jar principles...
2597
GlenR
grayco4
Aug 13, 2011 3:57 am
I believe you are correct. The end caps are charge collectors and each time the ball gives up it's charge, the charge on the inductor ring gets stronger,...
2598
Antonio
acmqsoueu
Aug 14, 2011 1:22 am
... This idea will not work. If the wires connected to the charging brushes are both connected to the outer plates of the two Leyden jars interconnected...
2599
GlenR
grayco4
Aug 14, 2011 5:03 am
Thank you for your reply Antonio. I have enjoyed your posts and work for a long time and I respect your understanding of electrostatics. ... This is the crust...
2600
GlenR
grayco4
Aug 14, 2011 10:59 am
I uploaded the drawing. You will notice that the positive inductor (A) is supplied from the inside of the positive jar. The negative source comb (F) is...
2601
Antonio
acmqsoueu
Aug 14, 2011 8:56 pm
... The charges are really there, but bound to the opposite charges inside. There is no electric field in the outer surface. Remember that in any conductor,...
2602
Antonio
acmqsoueu
Aug 15, 2011 3:06 am
... The combs C and F are at the same potential, acting as ground connections (even if the outer plates of the jars are not actually grounded). When the disk...
2603
GlenR
grayco4
Aug 16, 2011 1:59 am
Thanks again for your reply Antonio. I believe you have confirmed my thoughts about this design. Your analysis of the sequence of opration agrees with my...
2604
Dennis
dennissakva
Sep 6, 2011 2:29 pm
Hello everyone, I don't know if it's a common knowlege or not, but I found 40 pin break away connectors to be very effective charge collecting brush. They are...
2605
Mark 42
m_kanzler
Sep 29, 2011 1:19 am
How about those metal combs designed to get lice out of kids' hair? Or the hair picks for the old "Afro" hair style (I dodn't know what the PC name of that...
2606
Richard Linder
tibia32
Oct 1, 2011 11:59 am
Hi Everyone: There are lots of choices out there that might serve as a collector but before re-inventing the wheel it might be good to keep a few things in...
2607
Antonio
acmqsoueu
Oct 2, 2011 2:08 pm
Hello: I use aluminum foil cut with zig-zag scissors: http://www.coe.ufrj.br/~acmq/vdgext2.jpg Very safe. Doesn't damage the belt if due to some disadjustment...
2608
turner_chris1
Oct 10, 2011 3:34 pm
I just use multi strand wire speadout near the belt - again if it touches then it doesnt hurt the belt...
2609
Mark 42
m_kanzler
Oct 28, 2011 3:02 am
For some reason the pictures aren't visible for me. Anyway... I plan to use stainless steel mixing bowls. I'll braze them together and then use a disk or belt...
2610
Mark 42
m_kanzler
Oct 28, 2011 3:02 am
Pinking Shears - I hadn't thought of that. You could even cut twice to get twice as many points (by offsetting the second cut by 1/2 tooth) I looked up pinking...
2611
Antonio
acmqsoueu
Oct 29, 2011 4:03 pm
... Seems a lot of work. I would just fix a metal strip around the inner edge of one side and snap the other side over it. Polish the edges in order to not...
2612
ToddA
toddjwood
Oct 31, 2011 2:00 am
... Hello and welcome, I used a pvc roller for the top and a vinyl roller for the bottom have gotten decent results. At work we have Teflon tape that is used...
2613
Bedwell
ilovethepug
Nov 3, 2011 1:45 pm
I used Teflon mat from a sewing store to cover my top roller From: VanDeGraaffGenerator@yahoogroups.com [mailto:VanDeGraaffGenerator@yahoogroups.com] On Behalf...
2614
Earl Stirling
earlstirling
Nov 3, 2011 6:12 pm
Something cheap and easy to try might be the yellow teflon tape used for gas fittings. It's like the white only much thicker. Check your local hardware...
2615
Alexander Boeckeler
alexboeckeler@...
Nov 4, 2011 12:57 am
Hello, I´m a german VDG Builder. i´ve build several teslacoils,marx generators and now i´ve build a van de graaff generator. Here the specs of the VDG: ...
2616
Mark 42
m_kanzler
Nov 4, 2011 12:57 am
I'd imagine a wider belt increases voltage. But, how does belt length (distance between the rollers) affect the output voltage and charge rate (time between ...
2617
mrapol
Nov 28, 2011 2:13 am
While reading some admittedly fringe works on "electrogravitics" I came across mention of a type of high voltage electrostatic generator which seems very...
2618
mrapol
Nov 29, 2011 9:24 pm
Idle question: I read in many old books about people powering Tesla coils with induction coils. I have two induction coils, one rated at 60kV and one up to...
2619
brewers_2150
Nov 30, 2011 2:41 am
Hello, I'm a new member on this group. I've got most of the parts and am about to start building my first Van de Graph machine. I've seen most of the articles...
2620
Elmer Wiersma
elmerwiersma
Nov 30, 2011 6:56 am
These are my opinions others may vary question 1 black rubber usually contains carbon as they use that to color the rubber and carbon conducts but if you find...
2621
Elmer Wiersma
elmerwiersma
Nov 30, 2011 7:23 am
I do not know much of tesla coils but do they not operate somewhat similarly to induction coils in that you build an electric field in one small coil and when...
2622
Richard Linder
tibia32
Nov 30, 2011 8:11 pm
Hello Stan and welcome: The following is based on my experience, research and having built two large VDGs. Stay away from black material. Most black rubber is...
