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From: chn@a.lanl.gov (Charles Neil)
Newsgroups: comp.sys.mac,sci.electronics
Subject: Re: MAC-II fan noise
Summary: now, where can we get quiet drives!
Keywords: noise, fan, headache
Message-ID: <810@a.lanl.gov>
Date: 19 Jan 89 06:24:02 GMT
References: <494@phoibos.UUCP> <6186@polya.Stanford.EDU>
Organization: Los Alamos National Laboratory
Lines: 30

In article <6186@polya.Stanford.EDU>, kaufman@polya.Stanford.EDU (Marc T. Kaufman) writes:
] In article <494@phoibos.UUCP> ge@phoibos.UUCP (Ge Weijers) writes:
] 
] >              ... Does anyone know how to reduce the noise, e.g. by replacing
] >the built-in fan with a silent type that is powerful enough to keep the
] >temperatures low?...
] 
] Replace the power supply fan with one from Radio Shack (part no. 273-243,
] $14.95).  Instructions for doing this were posted on the net some time ago,
] but even without instructions it is obvious once you open the power supply
] case.  The RS fan is 27 cfm as opposed to the original 32 cfm, but is so
] quiet that you think something is wrong -- because you can hear the disk arm
] positioning.
] 
] Marc Kaufman (kaufman@polya.stanford.edu)

I replaced my fan with the RS fan referred to above.  I didn't know about 
instructions at the time which is just as well because the instructions I
finally *did* see after finishing the project referred to a different 
power supply manufacturer than the one in my Mac.  Anyway, it was easy 
compared to rebuilding my F150's 360 cu. in. V8 (the intake manifold is
a lot lighter :-) ), and now things are much quieter.  The noisiest thing
is the good old 80SC.  Anyone have a part number for a quiet fan for hard
disks?


-- 
 
Charlie Neil (chn@lanl.gov)
Los Alamos National Laboratory (505) 665-0978