big Heatsink VS Cooling Fan - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 13th April 2002, 04:33 PM   #1
diyAudio Member
 
Join Date: Apr 2002
Location: Hong Kong
Question big Heatsink VS Cooling Fan

I am now planing my Aleph2 project
have a problem between Choose Heatsink or Fan

but i am afraid the noise will generate to the Amp.

can be prevent?

thanks
  Reply With Quote
Old 13th April 2002, 05:36 PM   #2
Freddie is offline Freddie  Sweden
diyAudio Member
 
Join Date: Oct 2000
Location: Sweden
I would use big heatsinks and no fan. Cause the fans are too noisy for my liking. But of course you can use smaller heatsinks and fan.

But remember to use really big heatsinks!!
The heatsinks should have a thermal rating of about: 0,083K/W (if you use one heatsink per channel)
So that the the heatsink will operate at about 25 degrees above ambient.

/Freddie
  Reply With Quote
Old 13th April 2002, 05:39 PM   #3
diyAudio Member
 
Jason Hubbard's Avatar
 
Join Date: Apr 2001
Location: Poole, England
Talking Water cooling

There has already been much discussion about water cooling an Aleph.

There is the possibility then to locate the radiator and fan outside the building where the noise will not affect your listening, then you only have circulating water which is virtually noiseless if all the air is bled from the system.

This is more efficient than heatsinks, but obviously less portable.

You might be able to buy a surplus/second hand air conditioning heat exchanger and fan already made for external mounting. This would shave a big chunk of cost off of your project.
  Reply With Quote
Old 14th April 2002, 12:56 AM   #4
Lenin is offline Lenin  United Kingdom
diyAudio Member
 
Join Date: Feb 2002
Location: London
Cool Go for fan cooling!

Cephas,

How big is your room and do you have children?

Small children + scaldiing hot heatsinks is obviously a big no - no.

My preference (or prejudice) is for fan cooling. The ability to have a fabulous sounding - but domestically acceptable class - a amp is just too tempting for me and I'm putting my effort yogether as we speak.

I'm using a pair of fan cooling assemblies from IMI Marston - rated at 0.12 degC/W, with low noise (12db) fans from Papst. Additionally, I'm using special 3mm thick polymer decouling washers to decouple the cooling assemblies and fans.

The intention is to finish up with monobock units that any of us would be pleased to have in our homes on asthetic grounds alone. (But which just happen to dissapate 500w watts each and sound fantastic).

This route is, perhaps slightly more expensive that the 'industrial heater the size of an air conditioning unit' approach, but is, in my view, worth it.

Go for fan cooling! (Don't forget to post your results).
  Reply With Quote
Old 14th April 2002, 02:55 AM   #5
Warp Engineer
On Holiday
 
AudioFreak's Avatar
 
Join Date: Oct 2001
Location: Queensland, Australia
Dont forget, neither fan cooling or heatsinks help with keeping the room cool. If you are living in an environment that does not require room heating, your probably going to find the increase in room temp uncomfortable unless you have the aircon running .... water cooling (where fresh cool water is continually flowing from the inlet and only used once before being removed from the system) solves this problem as most of the excess heat goes with the water.
  Reply With Quote
Old 14th April 2002, 03:27 PM   #6
diyAudio Member
 
Join Date: Apr 2002
Location: Hong Kong
thanks all
my main problem is hard to desgin the outlook for my Aleph2
for mono 300W have almost 200W to be heat.
to by heatsink is not are problem for me
but the seller haven't and data about the heatsink ..(???C/w)
and if use fan or water cooling i can save more wire.
but i hate the sound noise too and don't want to check the water level evey time before listen music( joking)

frist for my plan is to place 4 heatsick(each about 25X30X5cm)
type like below.

| | | | | | | |
| | | | | | | |
-------------------------

on the 4 side of the Aleph (mono) total use 8 heat sink
is it enough?
but i think is ungly outlooking

and other ideal is using "Peliter" and "magnetic bearing fan"
it can force the mosfet more cooler then heatsick
but need a big power to push them
the costing may higher

??!!! how to Choose??
any good design?
  Reply With Quote
Old 15th April 2002, 01:31 AM   #7
Warp Engineer
On Holiday
 
AudioFreak's Avatar
 
Join Date: Oct 2001
Location: Queensland, Australia
The method of water cooling i suggested above does not have a water level as such because while the amp is operating, it continually draws fresh water from plumbing and disposes of that water after only one cycle. Advantage of this system (Grey has said this before) is lower water flow requirements because the water is cooler so the pump can be made pretty much silent but it will cost more to have the water running all the time
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Amp Cooling SxiCj08 Solid State 8 8th November 2008 12:40 PM
PC processor copper heatsink for amp cooling ? Bernhard Solid State 5 18th December 2005 01:20 AM
2 air way fan cooling on amp? 2fast Chip Amps 6 5th June 2005 04:07 PM
fan cooling? Raj1 Pass Labs 22 8th January 2003 02:33 PM
Cooling an amp with poor cooling BAM Solid State 8 31st December 2001 04:40 AM


New To Site? Need Help?

All times are GMT. The time now is 02:05 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2