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Were you thinking of this?



It is a sorption pump and is useful for small things.

I think it could be used very well for testing gauges but not for pumping down a
chamber of a significant size

--- In VacuumX@..., gjnelson@a... wrote:

Were you thinking of this?



It is a sorption pump and is useful for small things.

I think it could be used very well for testing gauges but not for

pumping down a

chamber of a significant size

some time ago on the net i saw a site witch talked about plans to

make

your own VD pump out of ordinary threaded steel or copper pipes

and

fittings and performed quite good especialy from out of standard
plumbing stuff, i cant remember what magazine it was all i know

that

it was a monthly science mag like american scientist or amateur
scientist or something like that

no no i was talking about a real home made vapor diffusion pump damm
i cant remember in witch magazine and what article it was :( ill try
to trace that info

--- In VacuumX@..., "nano_tronics" <nortronics@s...>
wrote:

--- In VacuumX@..., gjnelson@a... wrote:

Were you thinking of this?



It is a sorption pump and is useful for small things.

I think it could be used very well for testing gauges but not for

pumping down a

chamber of a significant size

some time ago on the net i saw a site witch talked about plans

to

make

OK found it :)

just read the article

your own VD pump out of ordinary threaded steel or copper pipes

and

fittings and performed quite good especialy from out of standard
plumbing stuff, i cant remember what magazine it was all i

know

that

it was a monthly science mag like american scientist or amateur
scientist or something like that

no no i was talking about a real home made vapor diffusion pump

damm

i cant remember in witch magazine and what article it was :( ill

try

to trace that info

On Monday, November 10, 2003, at 11:17 AM, nano_tronics wrote:

OK found it :)

The web site for this publication (The Bell Jar) can be found here:


You can even buy printed back-issue collections.