Date: Tue, 04 Sep 2001 21:50:36 +0200

Author: Urs Lauterburg

Subject: Re: Please help me spend some $$ - need vacuum pump

Post:

Roger,

Leybold actually sells a unit quit similar to Cliffs self made setup which
was really nice of course. What I like about the Leybold unit is, that the
light pulses are produced by a bright reddish power LED, so you can
actually see the light when you dim the auditorium illumination a bit. With
a reasonably fast scope (100M bandwith is enough) you can perform the
experiment. Of course it is nice to have one of the new color TDS scopes
from Tektronix, the one Cliff used for his impressive speed of light
performance.

The Leybold unit is not cheap but then again it works well and you can
spend time doing something which has never been done before. If you need a
part number let me know and I dig it up. I always think it's better to have
a few long lasting quality things which will still be admired by future
generations than filing up a space with a lot of junk.

Kind regards

Urs

PS. And then again you could always spend a some money on a LabVIEW
Professional Development System for one of these high end dual processor
Macintosh G4 machines. This would be a long lasting tool to create your own
custom virtual Instrumentation without having to solder wires and carry
boxes. This just being said a side and it is my own opinion.


> I missed that, but could use the model number if anyone has it.
>
> Cliff - what about those electronics you were using for the speed of
>light demo?
> (you know, the $300 detectors and so on?)
>
> - Roger
>
> At 10:20 AM 9/4/2001 -0500, you wrote:
>
>
>Roger,
>
> Did you see Sammy's awesome vacuum system at Rochester? I have a proposal in
> the works here to make a version of it here.
>
> Cliff
>
> ----- Original Message -----
> From: "Roger Key"
> To:
> Sent: Tuesday, September 04, 2001 9:47 AM
> Subject: Re: Please help me spend some $$ - need vacuum pump
>
>
> > Tappers:
> >
> > anyone have a recommendation for a lecture vacuum pump?
> >
> > something that can easily be carried up and down about 4 stairs would be
> nice.
> >
> > Thanks,
> >
> > -Roger
>
>
>
> =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
>
>
>Roger
>Key
>rogerk@csufresno.edu
>
>California State University,
>Fresno
>phone 559-278-2728
>
> Department of Physics
>MH#37
>paper fax 559-278-7741
>
>
>2345 E San Ramon
>Ave
>
>
>
>Fresno CA
>93740-8031
>
>
>
>Physics Department Web
>Page:
>http://physics.csufresno.edu
>
>Downing Planetarium Web Page:
>http://www.Downing-Planetarium.org
>
>Physics Instructional Resource
>Association:
>http://www.pira.nu


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