Date: Thu, 24 Feb 2011 09:52:46

Author: Tom Johnson

Subject: Re: Best commercial VDG

Post:

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Try putting the belt in a ziplock bag with talc powder and shake
it. Knock off the excess talc from the belt. It has helped in the past.

At 09:43 AM 2/24/2011, you wrote:

>Try warming it up with a hair dryer. ...Doug J.
>
>
>On 2/24/11 9:16 AM, "Zani, Gerald" wrote:
>
>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 ;-).
>
>
>

Later,
Tom G. Johnson
Dept. of Physics & Astronomy
Washington State University
Pullman, WA 99164-2814
Phone: (509) 335-5097
Email: johnstm@wsu.edu
Web page: http://physics.wsu.edu/demos/default.htm

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Try putting the belt in a ziplock bag with talc powder and shake
it. Knock off the excess talc from the belt. It has helped in
the past.
At 09:43 AM 2/24/2011, you wrote:
Try warming
it up with a hair dryer. ...Doug J.

On 2/24/11 9:16 AM, "Zani, Gerald"
wrote:


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
<
mailto: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 ;-).






Later,
Tom G.
Johnson
Dept. of
Physics & Astronomy
Washington
State University
Pullman,
WA 99164-2814

Phone: (509) 335-5097
Email:
johnstm@wsu.edu
Web page:

http://physics.wsu.edu/demos/default.htm



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From tap-l-owner@lists.ncsu.edu Thu Feb 24 13:00:37 2011

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