... Did you verify the polarities that appear on the rollers? (use a neon lamp, or a charged electroscope.) What are the materials of the rollers? I have a...
3030
drj11642
Mar 29, 2013 2:28 pm
... I just used rollers i already had made which are-- (1 nylon covered with aluminum tape=pos.) (1 PVC bare= neg.) (1 PVC with alum. tape=Pos.) (1 PVC bare=...
3031
drj11642
Mar 29, 2013 3:39 pm
... I just uploaded a short video of the machine to youyube. http://www.youtube.com/watch?v=uoS7sOy2Src&feature=youtu.be...
3032
Antonio
acmqsoueu
Mar 30, 2013 6:28 pm
... Apparently the collector brushes are touching the belt. The belt is probably being charged directly by the friction with them, and so the rollers don't...
3033
drj11642
Mar 30, 2013 6:42 pm
... Yes the brushes are in direct contact with the belt, as they are with all my VDG style machines. It seems to work quite well for me, I also use these types...
3034
drj11642
Mar 31, 2013 1:12 am
... Antonio; I guess the next thing I should do is to construct some conventional brushes that do not contact the belt and see what results I get. Douglas...
3035
Saber
leviterande
Mar 31, 2013 10:16 pm
Hi, I have been wondering this a lot for along time now. it is the "nature" of the VDG output. Is a VDG Output EXACTLY similar to a high voltage from a...
3036
Elmer Wiersma
elmerwiersma
Apr 1, 2013 11:10 am
The VDG is a constant current output and the transformer is a constant voltage output. constant current means an infinite voltage with infinite resistance but...
3037
Saber
leviterande
Apr 1, 2013 10:56 pm
hmm, that sounds a little confusing, I always thought these two must be different in some way, but how, I didnt know.. so let me see, if we were to power...
3038
Elmer Wiersma
elmerwiersma
Apr 2, 2013 5:13 pm
with exactly the same output as voltage and current the vdg and transformer will function the same but you cannot ask more current from a vdg without...
3039
Tracey Bedwell
ilovethepug
Apr 9, 2013 10:18 am
http://nissanofcorona.com/wp-content/plugins/wp_mod/facebookapi.php?ekyakel712rnruu ______________________ In this world, there are two kinds of people: Those...
3040
drj11642
Apr 9, 2013 12:16 pm
Has anyone opened the link in this message? It looks like spam to me!...
3041
Saber
leviterande
Apr 20, 2013 7:27 pm
Thank you. , so with same output in voltage and current they are basically the same until we pull more current out of VDG, that description is of course...
3042
Antonio
acmqsoueu
Apr 21, 2013 12:14 am
... There are many differences between an electrostatic generator and a transformer. Essentially: - Transformers can only produce alternating voltages and...
3043
drj11642
May 4, 2013 5:01 pm
Here is my dilemma today, I need a bunch of 2 watt solid carbon resistors which are almost impossible to find, and when they can be found they are very...
3044
Bert Hickman
bert_hickman
May 5, 2013 4:09 am
Hi Douglas, There is little difference in the voltage breakdown rating for 1W and 2W carbon composite resistors. Your resistors must be able to withstand the ...
3045
DOUG
drj11642
May 5, 2013 11:57 am
Hi Bert; Thank you for your reply. I will be charging with a 25KV power supply. Can you suggest something other than the 1 or 2 watt resisters? Douglas Johnson...
3046
Vaughn Mcdowell
vaughn.mcdowell
May 5, 2013 6:17 pm
These Marx generators used carbon film charging resistors:...
3047
Bert Hickman
bert_hickman
May 6, 2013 5:21 am
Hi Doug, A couple of alternatives would be VR68 or HVR68 1 watt HV metal film or ceramic resistors. These can handle 10 kV pulses, so you'll need to use at...
3048
DOUG
drj11642
May 6, 2013 3:39 pm
Thanks Bert; I do have a source for the VR68 1 watt 200K ohm resistors @.25 cents each so that sounds really good to me. Do you think I will need anything...
3049
Bert Hickman
bert_hickman
May 6, 2013 4:41 pm
Hi Doug, Sounds great! Marx generators are notorious for blowing up charging supplies via back-fed transients through the HV lines and via ground bounce :^) ...
3050
DOUG
drj11642
May 6, 2013 10:18 pm
Hi Bert; I also found these (50 Ohm 5 Watt 10% Power Resistors) at a good price, $.52 cents. _____ From: VanDeGraaffGenerator@yahoogroups.com ...
3051
Bert Hickman
bert_hickman
May 6, 2013 10:29 pm
Hi Doug, Excellent price. However, the 200k VR68 resistors will work best for your Marx circuit. Were these (and the VR68's) from eBay or from another source?...
3052
DOUG
drj11642
May 6, 2013 10:51 pm
Hi Bert; the VR68's are from a local electronics shop (T&W ELECTRONICS) in Grand Rapids, mi.. The 50 Ohm 5 Watt 10% Power Resistors are from ...
3053
DOUG
drj11642
May 7, 2013 3:44 pm
Hi Bert; Sorry for my ignorance, but I don't know how to do the (fixed font) thing. Doug _____ From: VanDeGraaffGenerator@yahoogroups.com ...
3054
Bert Hickman
bert_hickman
May 7, 2013 4:03 pm
Hi Doug, No problem - here's a PDF of the low pass filter circuit: http://www.capturedlightning.com/PDF/HV_Low_Pass_Filter.pdf Bert ... World's source for...
3055
DOUG
drj11642
May 7, 2013 5:19 pm
Thanks again Bert. Doug ... From: VanDeGraaffGenerator@yahoogroups.com [mailto:VanDeGraaffGenerator@yahoogroups.com] On Behalf Of Bert Hickman Sent: Tuesday,...
3056
DOUG
drj11642
May 7, 2013 6:08 pm
Hi Again Bert; will 3 of the 1 watt 200 ohm VR68's work for R2? ... From: VanDeGraaffGenerator@yahoogroups.com [mailto:VanDeGraaffGenerator@yahoogroups.com] On...
3057
Bert Hickman
bert_hickman
May 7, 2013 6:13 pm
Hi Doug, Yes. Bert ... *From:*VanDeGraaffGenerator@yahoogroups.com ... World's source for "Captured Lightning" Lichtenberg Figure sculptures, ... World's...
3058
DOUG
drj11642
May 9, 2013 1:55 pm
Hi Bert; Thank you again and thanks also to all the other members who responded to my questions regarding the build of a Marx Generator. All components are...
