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From: daveh@cbmvax.UUCP (Dave Haynie)
Newsgroups: comp.sys.amiga
Subject: Re: Noisy A2000 fan
Message-ID: <2573@cbmvax.UUCP>
Date: Wed, 21-Oct-87 19:13:14 EDT
Article-I.D.: cbmvax.2573
Posted: Wed Oct 21 19:13:14 1987
Date-Received: Sat, 24-Oct-87 13:31:16 EDT
References: <1663@mit-amt.MEDIA.MIT.EDU>
Organization: Commodore Technology, West Chester, PA
Lines: 25

in article <1663@mit-amt.MEDIA.MIT.EDU>, ralph@mit-atrp.UUCP (Ralph L. Vinciguerra) says:
> 
> I realize that more airflow is needed in the A2000 after talking to one
> of the Commodore Engineers at Amy Expo. But. Isn't it possible to use
> a larger fan blade unit, running at a lower RPM ? I thought that most of
> the fan noise was due to turbulence at the blade edges.  ...
> I can even hear my A1000 sometimes. I keep it on all the time
> in a small bedroom, and it takes a while to get used to (I live in the
> country where the outdoor ambient noise is low).

Maybe you've got an exceptionally loud A1000; mine can't be heard unless I
really concentrate on it from a close distance.

The A1000 does exactly what you suggest; it has a lower RPM, "hamster wheel"
style fan.  This fan, hidden in the power supply, extends nearly the full
length of the machine, though the diameter of the wheel is rather smallish.

The A2000's muffin fan basically trades speed for size.  It's got quite a bit
more cooling to do than the A1000, and less space for itself.  Any place you
could have put a hamster wheel fan, we've put an expansion slot or a disk
drive.
-- 
Dave Haynie     Commodore-Amiga    Usenet: {ihnp4|caip|rutgers}!cbmvax!daveh
   "The B2000 Guy"              PLINK : D-DAVE H             BIX   : hazy
    "Computers are what happen when you give up sleeping" - Iggy the Cat