Cheap vacuum pump

• To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
• Subject: Cheap vacuum pump
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Fri, 31 Oct 1997 08:19:00 -0600
• Approved: tesla-at-stic-dot-net

From: 	ghunter-at-mail.enterprise-dot-net[SMTP:ghunter-at-mail.enterprise-dot-net]
Sent: 	Friday, October 31, 1997 9:15 AM
To: 	tesla-at-pupman-dot-com
Subject: 	Cheap vacuum pump

Years ago I read an article in an ancient volume of "Scientific
American" magazine.  The author described how to build a vacuum pump
using a rotary compressor from a discarded refridgerator.  He vented
the freon, drained out the old oil, & refilled it with vacuum pump
oil.  Of course, he had to solder on a few pieces of copper tube for
hookup.  He used it to make a homebrew x-ray tube, so it must've
pulled a pretty hard vacuum!  For poor coilers who can't afford a real
pump, this sounds like a cheap & interesting experiment that could
lead to better poly caps.  When I get back to the US I plan to try it 
myself.

Greg

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