Fan cooler for JLH 10W a-class

adirax · 1st October 2003, 08:43 PM

Fan cooler for JLH 10W a-class

Please, Can anybody help me?
I bought for my JLH amp (under construction) 4 coolers Cooler Master TP2-5020B2. It's a pentium 2 cooler, Rth=0.56C°/w if fan turns at 4700 rpm.
I intend to use them at half speed in order to reduce the fan noise (32 dB at 4700 rpm).

Now my problem is: how can I calculate the new Rth when speed is only 2300 rpm?
I mean must I think to add passive heatsinks? (The dissipated power on each MJ15003 will be 40W.)

many thanks,
AR

Alex P · 14th May 2004, 06:18 PM

pentru 40W iti recomand un radiator de PC cat mai mare si ventilatoare >8cm la ~1800 rpm.
isi fac treaba excelent si sunt silentioase.
Ventilatoarele tale fac zgomot nu gluma

tschrama · 15th May 2004, 02:02 AM

I have had good results getting rid off 70Watt from a single pentium II cooler at just a fraktion of it's normal rpm.. My feeling is that you can get away with it....

Goodluck,
Thijs

Devil_H@ck · 15th May 2004, 11:21 AM

Maybe you can find a graph showing the Rth vs wind speed somewhere on the manufacturer's site?

1st October 2003, 08:43 PM	#1
adirax diyAudio Member Join Date: Oct 2003 Location: Orleans, France	Fan cooler for JLH 10W a-class Fan cooler for JLH 10W a-class Please, Can anybody help me? I bought for my JLH amp (under construction) 4 coolers Cooler Master TP2-5020B2. It's a pentium 2 cooler, Rth=0.56C°/w if fan turns at 4700 rpm. I intend to use them at half speed in order to reduce the fan noise (32 dB at 4700 rpm). Now my problem is: how can I calculate the new Rth when speed is only 2300 rpm? I mean must I think to add passive heatsinks? (The dissipated power on each MJ15003 will be 40W.) many thanks, AR

14th May 2004, 06:18 PM	#2
Alex P diyAudio Member Join Date: May 2004 Location: Bucharest	pentru 40W iti recomand un radiator de PC cat mai mare si ventilatoare >8cm la ~1800 rpm. isi fac treaba excelent si sunt silentioase. Ventilatoarele tale fac zgomot nu gluma __________________ Alx.P

15th May 2004, 11:21 AM	#4
Devil_H@ck diyAudio Member Join Date: Dec 2003 Location: Belgium	Maybe you can find a graph showing the Rth vs wind speed somewhere on the manufacturer's site? __________________ Website: http://members.lycos.nl/anthonyvh

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Cooler cd/radio player	ShtrMcGavin	Parts	4	28th April 2007 04:40 AM
Search fan cooler for the KSA 100 Mk 2	Alex helge	Solid State	0	18th September 2006 11:37 PM
noise from a cooler (two different ones)	facundonu	Chip Amps	12	6th July 2006 01:09 PM
peltier cooler	karma	Swap Meet	6	5th December 2005 01:55 PM
CPU cooler for amplifier	Circlotron	Solid State	16	27th December 2002 11:58 PM


	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

15th May 2004, 02:02 AM	#3
tschrama diyAudio Member Join Date: Jul 2001 Location: The Netherlands	I have had good results getting rid off 70Watt from a single pentium II cooler at just a fraktion of it's normal rpm.. My feeling is that you can get away with it.... Goodluck, Thijs

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read