Rustynail, That is a wow machine - when you decide to retire it please let me buy it for my cpap museum (but, I am sure that with such a long close relationship you will want to keep it yourself)
The oldest / biggest one I have to date is an original Bipap S/T (big box).
But, I did recently get one machine that is a 'doozey' - the Respironics Quartet. This machine is dated 1998 and is actually a clinical machine - the insides are a sight to behold - some incredible plumbing & sensor lines (I will provide photos of the insides soon). It can do 4-functions = Auto, Bilevel, Cpap and split-night studies (why they called it the Quartet). It is
noisy compared to the latest machines.
I have done some pics of a Resmed S8 (the S8 is good for size comparisons) with ...
1) An original Bipap S/T
2) A Puritan Bennet PB320 Bilevel
3) My current favorite PB330 Bilevel (no good for nightly data but low on noise & very small for what it is )
I'll append a link to the pics ito this post n about 1-2 hours.
Enjoy
DSM
#2 the link
http://www.internetage.com/cpapinfo/old-cpaps-1/
again, enjoy
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respironics,
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CPAP,
auto