Hi all, I'm struggling to find the words to describe how the belt affects the VDG output. What materials on the triboelectric series make the best belts? My...
ALLAN: In my two commercial VDG machines, "Dental Dam" is used as a belt material with charging rollers of polyethylene and collecting rollers of solid...
Thanks HAL, I got my belt from www.durabelt.com, it is Polyurethane. It works well. but its just for my thesis, i never investigated any others. I have...
Allan: I can relate some experience and theories regarding belts: You are trying to charge a capacitor (the sphere) that by it's very nature has some leakage,...
Hi, Dick: You recently ordered an edition of "Homemade Lightning". Was it the 2nd edition ( 1996, the one I own), or the newer 3rd edition (2001, the one I...
Hello all! This is my first post to this group, hopefully the first of many! Like yourselves, I consider myself to be a VDG enthusiast. Anyway, I have created...
Hal & everyone else: I have the 3rd edition and was also looking at the Bonetti as a possible next project. However I intend to get Zeus working first. I am...
I have not heard of much success with ion generators on medium to large VDGs mainly due to the fact they cannot deliver much charging current. Most of the...
Hi, Dick & other Graaffers: My column was also a 10' length of 9"dia, 1/2" wall PVC, which was given to me by the storage yard foreman of our local water...
I'm not really gunning for charging current with my VDG, just terminal voltage/charge. About how long would it take to charge a 12" sphere at around 2 uA?...
It would be nice if we knew your name, Mr. vdgcentral! The charging current is determined by the choice of belt/roller materials, belt width, belt speed, and...
Hi Hal & all: Right now, the length of the PVC column is TBS. I have been considering 72" but your problem of sparking down the column keeps haunting me. Of...
DICK: Just wrap a perfectly rectangular sheet of paper around the column, (it should be double the length of the column circumference so it overlaps one...
Hal: Thanks for the correction.....I used to be great in a spelling bee but that was a long time ago! And again thanks for the paper wrapping method... PVC did...
Very Good, Dick! I also used to be very good at winning spelling bees in grade school. I remember when I was 10 years old in 1946, I won the South Bay School ...
Greetings, Under 'perfect' conditions it would take approximately 2.85 seconds for your 12" sphere to charge with 2 uA of current. As others have pointed out,...
Hi Dick, I watched the acrylic shop cut my pipe and they did it on a table saw. They set the fence up to be perpendicular with the saw blade, braced the pipe...
Hi Jon: I had thought about doing someting like that with my table saw. The only concern I had was to somehow be sure I didn't start cutting a spiral due to...
... perfect ... or ... You're welcome, Dick, but whatever method you use to cut that column, please watch your fingers! We still want you to be able to play ...
Hi all: I have a grandson, Isaac, who is 8 years old going on 18. He lives in Portland Oregon and we don't get to see each other very often. Unlike his parents...
DICK: I've been telling you and others for months about SCIENCE FIRST in Buffalo, New York. Haven't you been listening? They market VDG kits for the 200KV...
Hal & list: As a matter of fact because of your prior mention of the one you have, I did have them in mind as a source but wanted to open the subject briefly...
Hal & list: As a matter of fact because of your prior mention of the one you have, I did have them in mind as a source but wanted to open the subject briefly...
I don't remember exactlty where I read it, but I read that cardboard (which essentially is what Sonotube is) doesn't make a good insulator. ... Light,...
Greetings All, Don't be so quick to dismiss Sonotube as being completely useless for this application. Many Tesla Coilers have used Sonotube successfully for...
We're all here to learn & share our knowledge on electrostatics, right? I believe this can best be done without the air of a condescending attitude. I would...
Thanks for your post. I thought I was being hypersensitive. I only asked the question in sincerety, not to yank anyone's chain. Dick ... or ... absorbing...
... "It's a shame your wives won't let you have motorcycles...mine didn't either, but I showed my resolve by getting a couple of 'em anyway!" Hal, I've been...
