[RC5] Is that smoke I smell?

blitz blitz at macronet.net
Fri Mar 22 20:44:48 EST 2002


If youre using the DC fans, a small value resistor, (I cant remember the 
value rite now, but it's like 3.2 ohms) will slow down and quiet that fan 
for you.


At 15:08 3/22/02 -0800, you wrote:
>Actually, it's only about a 10 minute job to replace the
>'el-cheapo' fan which is in most power supplies.  I have
>replaced them with a Rotron Model 031162, which is a drop
>in fit.  These are true 'ball bearing' units, and will last
>as long ( or longer ) than your computer will.  They also
>move a large quantity ( 37 CFM ) of air, which not only
>keeps the power supply cool, but also pulls quite a bit of
>additional air through the case.  There is a small increase
>in the noise level though, as might be expected.
>
>
>-----Original Message-----
>From: owner-rc5 at lists.distributed.net
>[mailto:owner-rc5 at lists.distributed.net]On Behalf Of blitz
>Sent: Friday, March 22, 2002 12:08 PM
>To: rc5 at lists.distributed.net
>Subject: [RC5] Is that smoke I smell?
>
>
>Generally they're pretty much ok, (as Ive found plenty this bad or worse)
>UNTIL the fan quits.
>That switching power supply (commonly referred to as the computer's space
>heater) will get real hot, and start emitting a smell like burnt
>electronics long before a failure happens. (Like a week or so)
>In an office environment, where air is stale, and smells of office type
>people, this smell is unmistakable.
>Its a sure clue you will be replacing a power supply in short order. The
>quality of fans is real bad these days as well. Expect a year or two out of
>the el-cheapos.
>I've got "rotron" muffin fans in electronic equipment here that have run
>continuously for 30 years without failure or noise. But a power supply for
>your desktop is produced as cheaply as possible, like $10.00 so don't
>expect long life from the fan. The fan is a .50 cent add on, made by prison
>slave labor in one-hung-lo Provence in China, don't expect much.
>The problem is, one doesn't know how much time is left on the fan, if we
>knew, we'd open the power supply and put the $10.00 "rotron" fan in, to
>prevent the supply from roaching, but when one fails the power supply is
>gone with it as well...a catch 22 situation.
>
>A $10.00 fan would keep a $10.00 power supply from failing, but the labor
>to change the fan exceeds the cost of a new power supply and install. So
>like everyone else, we let them burn up, and make our $ changing them out
>to a PS with a fan that will last even less long..I guess thats "jhob
>security".
>
>
>
>At 09:37 3/22/02 -0800, you wrote:
> >HA. True. My computers are usually clean. To be honest it is the three dual
> >processor boxes at home that tend to pile up the dust and cat hair in the
> >fans...
> >
> >But I have been by friends to check out their office, a small company, to
> >find a 'server' locked in a back filing room under stacks of paper and with
> >six inches of dust on it. Its happened several times.....I'd hate to
>imagine
> >one of those fire hazzards running dnet, ud or seti. Just up it another 10
> >to 20 degrees...shouldn't hurt, right?
> >
> >
> >-----Original Message-----
> >From: blitz [mailto:blitz at macronet.net]
> >Sent: Thursday, March 21, 2002 5:43 PM
> >To: rc5 at lists.distributed.net
> >Subject: RE: [RC5] Service Pause Option
> >
> >
> >(Tongue in cheek mode on)
> >Well, if youre the sysadmin, aren't you supposed to blow out the dust and
> >rodent parts once in a while? I know "I" do...heh
> >
> >
> >At 14:05 3/21/02 -0800, you wrote:
> > >Did you ever run a heat test on your PC? With and without Dnetc running?
> > >Every computer that I have run one on runs hotter after it has been at
>100%
> > >utilization for awhile. Now go ahead and make the argument that I
> > >could/should use better heat sinks, fans, etc. But when you are running
> > >around putting dnet on machines that you do have any legal right to put
> >them
> > >on, and the individual who does on the machine is not aware, then how are
> > >they to take environmental considerations into account? Now there is the
> > >potential that you are damaging their equipment. You call it a long shot,
>I
> > >say it doesn't matter.
> > >
> > >
> > >
> > >-----Original Message-----
> > >From: Christopher Hicks [mailto:chicks at chicks.net]
> > >Sent: Thursday, March 21, 2002 10:17 AM
> > >To: RC5 list
> > >Subject: RE: [RC5] Service Pause Option
> > >
> > >
> > >On Thu, 21 Mar 2002, Bruce Wilson wrote:
> > > > Compare this to the physical analogy of a house.  If someone enters
> > > > your house without your permission, they can be prosecuted for
> > > > trespassing, even if they didn't touch anything while they were there.
> > >
> > >Right on!  I doubt any rational person is in disagreement with this.  But
> > >when people start comparing unauthorized dnetc's to theft, and
>prosecuting
> > >on that basis, people get rather bent out of shape -- and rightfully so.
> > >
> > >--
> > ></chris>
> > >
> > >"The whole problem with the world is that fools and fanatics are always
>so
> > >certain of themselves, but wiser people so full of doubts"
> > >                                 -- Bertrand Russell
> > >
> > >--
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