jdp@caleb.UUCP (Jim Pritchett) (06/19/89)
It's dumb question time again... (Don't blame me, I'm a software type these
days. Ok, blame me anyway...) Which direction should the A2000 fan be
running. Should it be pushing or pulling the air through the computer?
(Does it make any significant difference in cooling effectiveness?)
In case you haven't figured it out yet, I finally replaced the jet engine
that came with my A2000 with a somewhat quieter Radio Shack (tm) fan.
Naturally, this question only came up AFTER I had completed the replacement.
Thanks,
--
Jim Pritchett
UUCP: {killer|texbell}!letni!caleb!jdp
or killer!gtmvax!dms3b1!caleb!jdpdaveh@cbmvax.UUCP (Dave Haynie) (06/23/89)
in article <0969.AA0969@caleb>, jdp@caleb.UUCP (Jim Pritchett) says: > Keywords: A2000 fan > It's dumb question time again... (Don't blame me, I'm a software type these > days. Ok, blame me anyway...) Which direction should the A2000 fan be > running. Should it be pushing or pulling the air through the computer? > (Does it make any significant difference in cooling effectiveness?) Yup. It should be pulling air through the Amiga and out the fan. This can have the disadvantage of also pulling dust into your Amiga, but it's done this way because the fan is mounted in the power supply. If it forced air in from the back, it would get heated across the supply before going to your boards and all. > Jim Pritchett -- Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: D-DAVE H BIX: hazy Be careful what you wish for -- you just might get it
brianr@tekig5.PEN.TEK.COM (Brian Rhodefer) (06/23/89)
In article <0969.AA0969@caleb>(Jim Pritchett) writes: >It's dumb question time again... (Don't blame me, I'm a software type these >days. Ok, blame me anyway...) Which direction should the A2000 fan be >running. Should it be pushing or pulling the air through the computer? >(Does it make any significant difference in cooling effectiveness?) To: jdp@caleb.UUCP Subject: Re: A2000 fan Newsgroups: comp.sys.amiga In-Reply-To: <0969.AA0969@caleb> Organization: Tektronix, Inc., Beaverton, OR. With no particulate filters in the ventilation path, the the Amiga is acting as a dust precipitator, filtering crud out of the room air. Said crud is deposited on the circuit boards, floppy drive mechanics, floppy drive heads, and so on. I would guess that the majority of the crud will drop where the air velocity diminishes most abrubtly (reasoning by analogy with silt in a river). If you must have dust and junk accumulating inside your Amiga, I'd think it would be better if "maximum precipitation" occurred just inside the rear panel (fan pumping air INTO the amiga) than if it occurred inside the floppy drives. So I'd recommend putting positive pressure inside Amy. If you could stand the pressure drop it would cause, I'd also recommend adding a filter across the inlet of this fan, and cleaning it every so often. Brian Rhodefer