CHRIS: You are a veritable textbook on Electroscopes! I have accumulated everything required to build one except the gold leaf, but upon reading your post, I...
Wow. Lots of good info! For my purposes, something somewhat less sensitive a gold leaf electroscope (and much less fragile) is what I need. What I need are...
Hello again guys, I would like to ask what instruments do I use 1. to make sure that my VDG is working? 2. to measure the voltage capability of my VDG? 3. Can...
Greetings Graaffers: Chris: Great visit to MOS and the VDG. About two years ago I had the opportunity to visit the VDG during "off" hours and explore the ...
... with the aluminum can used as the sphere. On that note, I just remembered, can I substitute any metal sphere for the aluminum can? ... To tell if your VDG...
Hi Graaffer Fitz and the gang: You can make one measurement that will tell you if the rollers and belt material are correct and dry and if the spray and...
Good reply, Dick! We Graaffers will get Fitz cookin'! Everybody contributes something of value to the newcomers. If somebody contributes something that is ...
Yeah. Go to "Science First". They'll sell you a little 200KV machine for $137.50. It has a 7" terminal and will produce 5" sparks. I bought this machine in...
Chris & Graaffers: Last night I did a static show for one of the PTO's in town. For some reason unknown to me there were a few helium filled mylar balloons in ...
Hi, Dick & all Graffers: Dick, I thought your "balloon" post was a gas! (pun absolutely intended!) Dancing Mylar Spheres! While waiting for my 30" terminal, I...
Hi Hal and Graaffers: Sorry to hear about the worm feed on the lathe. My old Craftsman's feed is pretty sloppy and I usually avoid using it. Someday I am going...
Dick & Graaffers: I tried measuring my charging current, but in the process, I fried the IC in my digital multimeter, and my analog meter doesn't know what to...
Hi Hal & interested Graaffers: I also wrecked one of my cherished Simpson 260's under the same circumstances however..... I don't think we did them in when...
I -love- it! My wife wants me to do some Mr Science type stuff for her kindergarten class, I'm definitely using this. Although I might tie them down with...
All that makes sense to me. The part about how your meter was fried, roller vs belts, etc. As for that link: You measured your current at essentially a dead ...
Sreve & Graaffers: Your feedback sure does make sense. I must have misinterpreted something in the article because I thought their charging current was 200uA...
DICK: On pumped machines, it doesn't matter as to the surface material of the upper and lower rollers. Throw the triboelectric list away! The lower roller's...
Hal & Graaffers: ... The Lower roller must be conductive as it is one terminal of the power supply, the other being the spray comb. ... <to the terminal, and...
Hello All, Everything that I've read on the subject seems to point to the following: If your lower roller has a negative potential (IE Teflon) then the belt...
DICK: You don't have to change the subject just because I'm finding it frustrating and confusing...perhaps other graaffers welcome these discussions! Isn't ...
JON: Well, now..ain't that somethin'! Here I've been runnin' all over the High Desert tryin' to find a suitable piece of PVC pipe for my new super-wide lower...
Jon, Hal & Graaffers: Hal, I just did not want you to get discouraged and fade into the background. I appreciate the subject matter of belts and roller ...
I know practically nothing about building anything related to electricity, but I somehow got it in my head that I wanted to build a Van de Graaff. At first I...
... a ... the ... read ... my ... ADAM: My advice is to start off with a machine that was designed to WORK from people who know how to build 'em, THEN, armed...
Hello everyone, Dick, thanks for the clarification about the roller width thing, your explanation makes more sense, I just couldn't remember all the details. ...
Adam: I can only agree with the advice you have already received in earlier posts. If you start from scratch, knowing little about electrostatics, you are...
JON: I(we)would sure like to see pictures of your machine under more favorable illumination; there is something interesting lurking within that darkness! ...
Thank you a lot. ... Do you Yahoo!? Yahoo! Search - Find what you’re looking for faster. Thank you a lot. Do you Yahoo!? Yahoo! Search - Find what you’re...
DICK & Graaffers at large: I agree with your statement that the spray comb should be narrower than the belt, which is illustrated by the configuration of the...
