I am looking to replace the cooling fan in my MOTU HD192. I believe it is
about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm depth.
Anyone know an online place that sells really high quality, low noise fans?

In article ,
Ken Buseman wrote:


I am looking to replace the cooling fan in my MOTU HD192. I believe it is
about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm depth.
Anyone know an online place that sells really high quality, low noise fans?

Bigger fans are quieter, unfortunately. Maybe Zalman has something
that'll fit your application? How hot does it get? I'd be tempted to
modify the case, add a big heat sink, put a bigger fan on somehow, or
drop the voltage to the current fan, or even, watch the temperatures on
whatever chip and decide whether it really needs a fan, long-term risks
be damned ;-)

Look for Zalman products that are meant for graphic card applications.
They might have a fan/sink/pipe solution that can fit your device
without major mods. I'm the sort of person without any compunctions
against using a dremel for problems of this nature :-)

James,

My purpose of the newer fan would be to reduce the noise the stock
particular fan makes. I'll try Zalman, but my solution is going to be
difficult to find. The current fan just makes this noise which resonates
thru the chassis. I've opened the case and traced it to the motor of the
fan, not the fan moving air. I need less noise but enough to keep this gear
cool enough.

thanks for the lead.


ken




"james" wrote in message
news:_rZ9c.16244$Q45.8703@fed1read02...
In article ,
Ken Buseman wrote:


I am looking to replace the cooling fan in my MOTU HD192. I believe it
is
about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm depth.
Anyone know an online place that sells really high quality, low noise
fans?

Bigger fans are quieter, unfortunately. Maybe Zalman has something
that'll fit your application? How hot does it get? I'd be tempted to
modify the case, add a big heat sink, put a bigger fan on somehow, or
drop the voltage to the current fan, or even, watch the temperatures on
whatever chip and decide whether it really needs a fan, long-term risks
be damned ;-)

Look for Zalman products that are meant for graphic card applications.
They might have a fan/sink/pipe solution that can fit your device
without major mods. I'm the sort of person without any compunctions
against using a dremel for problems of this nature :-)

In article ,
Ken Buseman wrote:

My purpose of the newer fan would be to reduce the noise the stock
particular fan makes. I'll try Zalman, but my solution is going to be
difficult to find. The current fan just makes this noise which resonates
thru the chassis. I've opened the case and traced it to the motor of the
fan, not the fan moving air. I need less noise but enough to keep this gear
cool enough.

Yep. I have a PC on my keyboard rig that is "almost" quiet enough. A
Shuttle XPC. I can hear the fan, but it's quiet compared to the disk
drive. I bought Zalman stuff for my office PC, and also vented a file
drawer. That puts it way below the noise floor of the office, and quite
silent to my aging ears. On that machine, I did take the fan off the
video card (it was a whiny little sucker), and replaced it with a heat
sink. That was in 2002, it's been powered up ever since. Granted,
I don't do 3-D games on that box, but I still wonder if the video card
fan is necessary.

Ken Buseman wrote:
I am looking to replace the cooling fan in my MOTU HD192. I believe it is
about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm depth.
Anyone know an online place that sells really high quality, low noise fans?

Digi-Key sells reasonable stuff, although I don't think you'll find any
that small with ball bearings.

Can you take the old one apart and regrease the sleeve bearing?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Ken Buseman wrote:

My purpose of the newer fan would be to reduce the noise the stock
particular fan makes. I'll try Zalman, but my solution is going to be
difficult to find. The current fan just makes this noise which resonates
thru the chassis. I've opened the case and traced it to the motor of the
fan, not the fan moving air. I need less noise but enough to keep this gear
cool enough.

If your problem is conducted noise, try shockmounting the fan on rubber
mounts.

You can also try speeding up and slowing down the fan and seeing if you
can find a rate at which it doesn't excite a cabinet resonance.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On Mon, 29 Mar 2004 11:50:25 -0600, "Ken Buseman"
wrote:

I am looking to replace the cooling fan in my MOTU HD192. I believe it is
about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm depth.
Anyone know an online place that sells really high quality, low noise fans?

Digikey sells Panasonic Pamotor fans, excellent and cheap. Don't
let the brand name bother you; they also make great capacitors.

Chris Hornbeck

Ken Buseman wrote:

I am looking to replace the cooling fan in my MOTU HD192. I believe
it is about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm
depth. Anyone know an online place that sells really high quality,
low noise fans?

A low noise fan of a given size often turns out to be a high noise fan that
turns at a slower speed, but is otherwise identical.

If noise is of the utmost importance, but major mechanical mods are not
possible, then simply slowing the fan down electrically can make sense.

Of course you must monitor to esure that critical parts don't overheat.

However, IME most fans in most equipment are running deep into diminishing
returns.

Here's a flexible device that often works the trick:

http://www.zalman.co.kr/english/product/cnpsfanmate.htm

You might try this:

http://tinyurl.com/3fs9a


HTH,

Robin Farrell
JuliRob Productions



"Ken Buseman" wrote in message
...
I am looking to replace the cooling fan in my MOTU HD192. I believe it is
about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm depth.
Anyone know an online place that sells really high quality, low noise
fans?

"Ken Buseman" writes:
I am looking to replace the cooling fan in my MOTU HD192. I believe
it is about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm
depth. Anyone know an online place that sells really high quality,
low noise fans?

http://quietpc.com has a lot of stuff like that.

"Arny Krueger" writes:
A low noise fan of a given size often turns out to be a high noise fan that
turns at a slower speed, but is otherwise identical.

Sometimes the blade tip simply has a different shape.

Paul Rubin wrote:

"Arny Krueger" writes:
A low noise fan of a given size often turns out to be a high noise fan that
turns at a slower speed, but is otherwise identical.

Sometimes the blade tip simply has a different shape.

You're right ! It's an airfoil !

I have tested various fans extensively over the years - ok - just comparing 80mm
models mainly but both noise and airflow are clearly affected by this.

Presumably this is why Papst are still in business ? At least they were last time
I looked !

Small fans need to run *very* fast to achieve any 'puff'. Therefore they are
noisy due to the high rpm and fail ( very noisy ) fast for the same reason too.
Avoid them at all costs.

Graham

james wrote:

In article ,
Ken Buseman wrote:


I am looking to replace the cooling fan in my MOTU HD192. I believe it is
about 2" square, perhaps a 50 mm x 50 mm size with about 12 mm depth.
Anyone know an online place that sells really high quality, low noise fans?


Bigger fans are quieter, unfortunately. Maybe Zalman has something
that'll fit your application?

I don't know the specifics of where the fan is located, but I
would suggest a bigger fan. In some situations, you can actually
use a fan adaptor to fit a larger fan (say 80mm) in place of a
smaller one (say 60mm) without too much cutting and whatnot.
For an example, see this link:

http://www.directron.com/directron/fanadapter.html

If this is a chassis fan, you could cut an additional hole
and add another similar-sized fan. If you replace them both
with quieter fans then cut the voltage (thus RPM), you should
be able to drop the noise significantly and get the same
airflow.

Just ideas of course.

- Logan

I bought some Sunon KDE2406PHB2's awhile back. 60mm 24 VDC but run very quiet at 12V.