Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!xanth!lll-winken!uunet!portal!cup.portal.com!FelineGrace
From: FelineGrace@cup.portal.com (Dana B Bourgeois)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Need advice on hardware projects
Message-ID: <17547@cup.portal.com>
Date: 24 Apr 89 04:36:45 GMT
References: <9891@netnews.upenn.edu> <6622@cbmvax.UUCP> <7916@killer.Dallas.TX.US>
Distribution: usa
Organization: The Portal System (TM)
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Eric Lee Green makes the comment that he doesn't understand why people
want QUIET fans.  I *love* the A1000 fan because it is so quiet.  I can
hear the telephone ring while it is on, I can listen to music without
blowing down the doors, I can...well, you get the idea.

As for the quietness of a fan, I think there are two ways to reduce
fan noise and both of them involve reducing the speed of the blade.  One
way is to use an AC fan which is derated to reduce its noise.  This is
a fan that may move say 55CFM that the manufacturer has slowed down to
deliver only 30CFM.  The other way is to buy a DC fan which can be
controlled by its input voltage.  In other words, get your hands on a
4 inch DC fan and dial the voltage up until the fan noise is just below
what you consider 'too loud'.  I've seen a few DC fans in the surplus
places and in the catalogs they are about 30-50% more than AC models.

Hope this helps.

Dana