ge@phoibos.UUCP (Ge Weijers) (01/16/89)
The MAC-II is a nice machine, but it is too noisy, especially for colleagues in the same room. 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? I tried a (Swiss-made) MICRONEL F70EB 012BN CB- but temperatures run too high using this fan. For a machine priced this high one would expect a little less noise. (P.S. although there are 'no user-servicealble parts' in the power supply, I'm willing to open it and have done so in the past). Any suggestions are welcome. Ge' Weijers Faculty of Mathematics and Computer Science Nijmegen University the Netherlands UUCP: ge@sci.kun.nl -or- ge@phoibos.uucp -or- uunet.uu.net!phoibos.uucp!ge (the last address seems to work most of the time)
capener@mips.COM (Christopher L. Capener) (01/18/89)
In article <494@phoibos.UUCP> ge@phoibos.UUCP (Ge Weijers) writes: >The MAC-II is a nice machine, but it is too noisy, especially for colleagues >in the same room. Does anyone know how to reduce the noise,....? > >Any suggestions are welcome. > Most dealers install the video card next to power supply (and the fan). Moving it to a slot in the middle of the bus reduces the fan noise somewhat. You might also try a thermostatically controlled variable-speed fan. -- Chris Capener capener@MIPS.COM MIPS Computer Systems, Inc. {ames,decwrl,prls}!mips!capener 930 Arques Avenue Sunnyvale, CA 94086-3650
kaufman@polya.Stanford.EDU (Marc T. Kaufman) (01/19/89)
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)
dplatt@coherent.com (Dave Platt) (01/19/89)
In article <6186@polya.Stanford.EDU> kaufman@polya.Stanford.EDU 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. Yup... this conversion is quite effective, as long as the Mac II in question isn't too "fully stuffed" (I'd be concerned about doing this mod to a Mac II with more than two cards, for example). My Mac II has been running this way since June '87, with nary a problem. I have the original version of the fan-replacement instructions on file here; I'll email them to anyone who wants 'em. Drop me a note if interested... -- Dave Platt FIDONET: Dave Platt on 1:204/444 VOICE: (415) 493-8805 UUCP: ...!{ames,sun,uunet}!coherent!dplatt DOMAIN: dplatt@coherent.com INTERNET: coherent!dplatt@ames.arpa, ...@sun.com, ...@uunet.uu.net USNAIL: Coherent Thought Inc. 3350 West Bayshore #205 Palo Alto CA 94303
chn@a.lanl.gov (Charles Neil) (01/19/89)
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
mo@well.UUCP (Maurice Weitman) (01/20/89)
;In article <6186@polya.Stanford.EDU> kaufman@polya.Stanford.EDU writes: ;< In article <494@phoibos.UUCP> ge@phoibos.UUCP (Ge Weijers) writes: ;< ;< > ... Does anyone know how to reduce the noise, e.g. by replacing ;<[...] ;< Replace the power supply fan with one from Radio Shack (part no. 273-243, ;[...] I agree. I did it about four or five months ago and it made the Mac II very quiet. Until last month. When the fan started sounding just like the old one. It was almost like it hadn't been working (the new one was so quiet). I've tried blowing air around; it does get very dusty in there. It seems like the bearings are gone. I'll probably replace the fan again assuming I got a bum fan from the shack. Oh well. Anyone else have that problem? -- Maurice Weitman ..!{hplabs,pacbell,apple,ucbvax}!well!mo | <- this is not a pipe 1634 Walnut Berkeley, CA 94709 (415)549-0280 Quote: "Facts are stupid things." Ronald Wilson Reagan, New Orleans, 1988 Disclaimer: Any errors in spelling, tact or fact are transmission errors.