Re: Cheap vacuum pump

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: Cheap vacuum pump
From: Tesla List <tesla-at-stic-dot-net>
Date: Sat, 1 Nov 1997 00:31:00 -0600
Approved: tesla-at-stic-dot-net


From: 	Mike Harrison[SMTP:wwl-at-netcomuk.co.uk]
Reply To: 	wwl-at-netcomuk.co.uk
Sent: 	Friday, October 31, 1997 11:48 AM
To: 	Tesla List
Subject: 	Re: Cheap vacuum pump

On Fri, 31 Oct 1997 08:19:00 -0600, you wrote:

>
>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
I wonder if it would be possible to convert one of the very cheap  car
tyre inflator pumps into a vacuum pump - I've not had one apart, but
if it can generate 30-60psi to inflate a tyre, it outta suck fairly
well! Or maybe it would just suck :-)