You may be confused about what "neutral" means. It is all relative, so a belt far on the positive side used with a roller in the middle (or so-called...
Steve & all: First of all, I'll leave the pics on as long as everyone can use them. Interesting that you are motivated to try different column configurations....
... them. ... of ... be ... is ... bottom ... moderately ... cut ... them ... like ... charge ... accomplished ... somewhat ... metal ... was ... three ... ...
... a ... against ... HAL: Just made that comment re leakage for the benefit of the entire group. By the way, have not had an update from you lately re...
... I'm not sure if I can change ownership of files. But I'll look at it. - Derrik doomicus@... ... If everything worked perfectly on the first try,...
Hello. I am new to this group. I have only a little experience with Van de Graaf generators. I've read up a bit on Bill Beaty's website, and I've browsed some...
Welcome to the group, Marie! We are honored to have a Lady Graaffer among us! There are several of us who have the experience and technical knowledge to be of...
DICK: Thanks for asking about the progress on Prometheus. So far I have applied 13 coats of Plasti-Dip around the sphere opening, and I expect to add enough ...
... I ... This is a standard roller arrangement for a "pumped" VDG. The power supply is connected to the lower roller and spray points. In your case apparently...
Hi, Dick... After 16 coats of goop around the sphere opening, producing an unbroken plastic insulating ring 1/16" thick, the same thing happens: Crackling...
Hi, I'm not an engineer by any means but I have made a small VDG (using two large salad bowls and some rather crude pulleys). Thera band belts. Made big...
Thanks for the input, Ian. Now, where do I get a 30-inch diameter cake pan to match my 30-inch sphere? I also have an old Morris & Lee (now Science First)...
Yes, it would be a BIG cake pan. What I'm thinking though is that you could have a mushroom shaped adaptor built up to just larger than the diameter of your...
Great ideas, Ian, but my lathe has only a 9-inch swing, and it's not set up for sheet metal forming or spinning. As for spinning spheres with entry holes, that...
Hal, I tried to email you directly but it was kicked back. Apologies to the group for taking bandwidth. I am interested (as I mentioned) in a sphere around the...
Graaffer IAN: If you really want my Glendale, California metal spinner to spin and ship your terminal halves 3000 miles to your Connecticut address, then I...
Hal & others: Sorry did not respond sooner but was battling a wet basement workshop due to very heavy continuous rain here in New England. Lousy VDG weather....
Hal: I re-read your message and looked at the picture. Those 1/4-20 rods would be suspect. Also, what happens if you remove the 7" grounded target and run the...
Greetings All, I must apologize for not writing sooner but I've been away on business for the last two weeks. I've spent some time this evening trying to catch...
DICK: I've been eagerly (and desperately) awaiting your assessment of my problem with Prometheus' performance. Thanks for getting back to me! Although I'm...
CHRIS: Your post is an eye-opener. I notice in our photo gallery that yours is the only home-brew VDG that uses equipotential rings, although I've seen ...
Hi Chris and Everyone else: Boy am I embarassed not to have connected the obvious! Many times have I seen the scar marks on the Texolite columns at the MOS...
Well, Dick & other Graaffers...this opens up a whole new field of discussion and experimentation. That blast of fresh air that Chris let in is a revelation! ...
Hi everyone: I posted the picture of the "Back To The Future" VDG upper roller assembly. I then tried to upload the PDF of the specification and look what ...
Hi Hal and everyone else: EPRs (Equi-Potential Rings).... might as well abbreviate it. I hate to think how many times we are going to type that in the next few...
GRAAFFERS When Steve Cole first sent me the Spec. Sheet for his big VDG, I received it as a matrix of hieroglyphics. Then he said I needed Adobe Reader 6.0 to...
Hal & Graaffers: PDF = Portable Document Format I could think of a few good substitutes. I too am very interested in learning about the design parameters...
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