Date: Thu, 24 Feb 2011 22:30:01

Author: Urs Lauterburg

Subject: Re: Best commercial VDG

Post:

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Jerry et al.,

Thank you very much for the various tips. I will certainly take a
look at the japanese model from Nada. With my affinity for japanese
things I have good confidence in your judgement. Isn't Nada former
Nakamura? I really like some of their stuff, some of it I have used
successfully for years by now. One really nice thing I think is
Nakamura's electric field apparatus with the flock in the narrow oil
tank. We even made some additional shapes to fit on the holder and
mounted a little handle to be able to quickly take the various forms
out of the holder. It makes the most beautiful electric field shapes
I have seen... well I guess I drifted off topic again... back to the
Science First VDG:

Well as I wrote I cleaned the whole unit with all parts. Most of it
with alcohol. I cleaned the belt with a soft soap and rinsed well
with water and distilled water afterwards. As I wrote, after that the
VDG zapped rather hefty for a while again but ceased rather quickly
and turned sour ;-(.

Maybe talcum powder will help. There was some of that on the belt
when it was new. So it may indeed help. Kind of strange however since
I thought good contact to the pulleys would be important.

I'm very thankful for your advices.

Kind regards

Urs

Urs Lauterburg
Physics demonstrator
Physikalisches Institut
University of Bern
Switzerland

>Urs,
>
>The culprit is often the belt. Try replacing it even if the one you
>have looks good. Still replace it with a new belt and test it out.
>
>I do not like the belt on the the Winsco and the SF model VDG.
>
>I was blown away when I witnessed the fantastic silicone coated
>rubber belt on the new Japanese made VDG called the VDG Raijin.
>
>http://nadascientific.com/science_education/van-de-graaff-raijin.html
>
>In my opinion this Raijin VDG is the best one on the market today.
>I watched it perform quite well here in RI in the summer where we
>suffer from extreme humidity in the summer because the humidity
>saturated hot air.
>
>If you're interested then talk with a fellow named Nouri Dassi. He
>is the USA representative. He can have the European rep contact
>you and visit you and perform a demonstartion.
>
>Here is Nouri's contact info:
>
>Nouri Dassi, Vice President
>NADA Scientific, Ltd.
>72 Lake Street
>Rouses Point, NY 12979
>Phone: 1-800-799-6232
>Fax: 518-297-3524
>nouri@nadascientific.com
>
>
>Best,
>- Jerry
>
>On Thu, Feb 24, 2011 at 11:38 AM, Urs Lauterburg
>
>wrote:
>
>Dear Tap-lers,
>
>Year ago (approx. 2004), following a discussion on tap-l about the
>best performance/prize VDG I did purchase the 400kV version from
>Science First. It worked quite well in the beginning but slowly
>degraded over the years of moderate use for occasional lecture
>demonstrations and suddenly turned very faint now when set up again
>for electrostatics.
>
>Once again I cleaned everything according to the Science First
>manual and according to tips from the William Beaty's VDG taming
>page (thanks Bill!)
>
>http://amasci.com/emotor/vdgtame.html
>
>This made it go a bit but performance somehow quickly deteriorated
>again. I have no real clue to why this is. The belt, the combs, the
>pulleys, the column?.. whatever.
>
>Maybe a fellow Tap-ler has the igniting idea based on a similar
>experience with the SF-VDG. Are the ones SF sells actually made by
>Winsco? Are they the same? What would be the best commercially
>available VDG that shows long longevity with unproblematic
>performance with a clear and effective maintenance scheme?
>
>I am aiming at consistent 10'' sparks in dry weather conditions.
>
>Thankful for any type of inputs
>
>Urs
>
>Urs Lauterburg
>Physics demonstrator
>Physikalisches Institut
>University of Bern
>Switzerland
>
>PS: I know Sam will tell me to grow my own ;-).
>
>
>
>
>--
>Gerald Zani
>Demonstration Manager
>Physics
>Brown University
>(401) 863-3964

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Jerry et al.,

Thank you very much for the various tips. I will certainly take a
look at the japanese model from Nada. With my affinity for japanese
things I have good confidence in your judgement. Isn't Nada former
Nakamura? I really like some of their stuff, some of it I have used
successfully for years by now. One really nice thing I think is
Nakamura's electric field apparatus with the flock in the narrow oil
tank. We even made some additional shapes to fit on the holder and
mounted a little handle to be able to quickly take the various forms
out of the holder. It makes the most beautiful electric field shapes I
have seen... well I guess I drifted off topic again... back to the
Science First VDG:

Well as I wrote I cleaned the whole unit with all parts. Most of
it with alcohol. I cleaned the belt with a soft soap and rinsed well
with water and distilled water afterwards. As I wrote, after that the
VDG zapped rather hefty for a while again but ceased rather quickly
and turned sour ;-(.

Maybe talcum powder will help. There was some of that on the belt
when it was new. So it may indeed help. Kind of strange however since
I thought good contact to the pulleys would be important.

I'm very thankful for your advices.

Kind regards

Urs

Urs Lauterburg
Physics demonstrator
Physikalisches Institut
University of Bern
Switzerland

Urs,

The culprit is often the belt. Try replacing it even if the one
you have looks good. Still replace it with a new belt and test it
out.

I do not like the belt on the the Winsco and the SF model VDG.

I was blown away when I witnessed the fantastic silicone coated rubber
belt on the new Japanese made VDG called the VDG Raijin.

http://nadascientific.com/science_education/van-de-graaff-raijin.html

In my opinion this Raijin VDG is the best one on the market today.
I watched it perform quite well here in RI in the summer where we
suffer from extreme humidity in the summer because the humidity
saturated hot air.

If you're interested then talk with a fellow named Nouri Dassi.
He is the USA representative. He can have the European rep
contact you and visit you and perform a demonstartion.

Here is Nouri's contact info:

Nouri Dassi, Vice President
NADA Scientific, Ltd.
72 Lake Street
Rouses Point, NY 12979
Phone: 1-800-799-6232
Fax: 518-297-3524
nouri@nadascientific.com


Best,
- Jerry

On Thu, Feb 24, 2011 at 11:38 AM, Urs
Lauterburg wrote:
Dear Tap-lers,

Year ago (approx. 2004), following a discussion on tap-l about the
best performance/prize VDG I did purchase the 400kV version from
Science First. It worked quite well in the beginning but slowly
degraded over the years of moderate use for occasional lecture
demonstrations and suddenly turned very faint now when set up again
for electrostatics.

Once again I cleaned everything according to the Science First manual
and according to tips from the William Beaty's VDG taming page (thanks
Bill!)

http://amasci.com/emotor/vdgtame.html

This made it go a bit but performance somehow quickly deteriorated
again. I have no real clue to why this is. The belt, the combs, the
pulleys, the column?.. whatever.

Maybe a fellow Tap-ler has the igniting idea based on a similar
experience with the SF-VDG. Are the ones SF sells actually made by
Winsco? Are they the same? What would be the best commercially
available VDG that shows long longevity with unproblematic performance
with a clear and effective maintenance scheme?

I am aiming at consistent 10'' sparks in dry weather conditions.

Thankful for any type of inputs

Urs

Urs Lauterburg
Physics demonstrator
Physikalisches Institut
University of Bern
Switzerland

PS: I know Sam will tell me to grow my own ;-).





--
Gerald Zani
Demonstration Manager
Physics
Brown University
(401) 863-3964



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From tap-l-owner@lists.ncsu.edu Thu Feb 24 17:42:10 2011

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