Date: Wed, 30 Oct 2002 08:54:05 -0700

Author: "Zigmund J. Peacock"

Subject: Re: Portable Vacuum Pumps


Bill, check out WWGrainger they have units for refrigeration repair which work
well and are very portable. Zig

Bill McNairy wrote:

> Hello all!
> Thanks for all of the assistance with why candles have their lovely blue
> and yellow lights-- however the discussion still rages here.
> On another note, I've just built the 'tennis ball vacuum cannon' as
> shown on Dick Berg's website at Maryland. It seems that a good seal is
> only possible for me by using a mechanical vacuum pump rather than the
> hand operated version we use with the Magdeberg spheres. In the hopes
> of taking this cannon on outreach visits to schools I would like to find
> a reliable yet portable vacuum pump. Fisher has one (part S41328F) for
> $635. Is this the best value on the market, or is there a less
> expensive alternative that offers similar pumping speeds and low pressure?
> Thanks for all of your assistance!
> bill
> From NC where we almost all of us are awaiting basketball season (except
> NCSU fans.)
> --
> *****************************************
> William W. McNairy, Ph. D.
> Lecturer
> Room 104I (919)-660-2689
> Dept. of Physics, Duke University
> Box 90305 Durham, NC 27708
> *****************************************

Zigmund J. Peacock
University of Utah/Physics
115 SOUTH 1400 EAST #201 Tel 801 581 6602
SALT LAKE CITY UT 84112-0830 Fax 801 581 4801

"We sleep safely in our beds because rough men stand ready in
the night to do violence to those who would do us harm"
-- George Orwell

"All that is necessary for the triumph of evil is that good
men do nothing!"
-- Edmund Burke