nead help with heatsink identicifation

joke · 12th November 2002, 04:47 PM

Hi I have 4 heatsink which I am planing to use for makeing Aleph 4 or 2 ( two per chanel - two mono blocks )... But I dont know what temperature coeficient thay have ( W/C ) ... or will thay be anough for aleph 2 ...
Dimensions are 210x120mm and high is 180mm ...
Can some one please help me to identificate their temperature coeficient ( W/C ) ...
Thanks ...
I'am planing to mont mosfets directli on heatsinks ( without any L - shape or something ) ... Is that O.K. ?

I hope that you will be ablle to se pic.

( sorry for my bad english )

dodonoid · 12th November 2002, 05:51 PM

Hi, joke!

I have used the same heatsink for my Aleph60. There are four of them per channel (three devices/sink), the temperature is about 40 grades celsius.

You can find the same heatsink profile used:
http://www.aussieamplifiers.com/1kwamp.htm

Try asking from the developer of the amp.

By the way, I heard that the profile is called H10.

Regards.

leroy · 12th November 2002, 06:18 PM

The dimensions of the heatsink you're displaying are comparable to Fischer's SK 144 sink which is rated at 0,55K/W for 75mm height.

leroy

grataku · 12th November 2002, 06:22 PM

joke,
love your avatar! Uhmm, it somehow comes out sounding wrong...

Anyways, what dondododnddo suggested would be more in line with my thinking.
For a 300 watts monoblock...180 mm high...I would be inclined to say 6 so you need 12.
Only four would make a nice stereo Aleph3 (200w total)

grataku · 12th November 2002, 06:25 PM

joke,
love your avatar! Uhmm, it somehow comes out sounding wrong...

Anyways, what dondododnddo suggesed would be more in line with my thinking.
For a 300 watts monoblock...180 mm high...I would be inclined to say 6.
Only four would make a nice stereo Aleph3 (200w total)

joke · 12th November 2002, 08:17 PM

Thanks people ... you are killing me ...
I was reali hopeing that this heatsink would be anough for aleph 4 at least

...
Whell i will then builld aleph 4 and see if it gets to worm I will changed it to aleph 3 ...
I have ollways know that this project loves aluminium ( Al ) but this much ( each heatsink is like 4.5 kg )

....
You just make my day bad ( and it was nice sunny day

, birds ware singing )

Thanks regards Josip

...now back to colecting parts...

joke · 12th November 2002, 08:38 PM

Here I 'am again ... I just look at the fishers elektronik SK 144 and I think that my one heatsink have something like 0.25 C/W heat desipation maybe 0.22 C/W.
http://www.fischerelektronik.de/_200...l_PDF/A_70.pdf

dodonoid · 30th November 2002, 04:58 PM

Hi all,

I've found the extrusion profile on the next WWW page:

http://www.fastron.com.au/heatsink.htm

Unfortunately they do not specify any "numbers". Maybe contacting them on e-mail would solve the problem. I'll try.

Cheers!

30th November 2002, 04:58 PM	#8
dodonoid diyAudio Member Join Date: Oct 2002 Location: Hungary	heatsik identification Hi all, I've found the extrusion profile on the next WWW page: http://www.fastron.com.au/heatsink.htm Unfortunately they do not specify any "numbers". Maybe contacting them on e-mail would solve the problem. I'll try. Cheers!

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12th November 2002, 05:51 PM	#2
dodonoid diyAudio Member Join Date: Oct 2002 Location: Hungary	Hi, joke! I have used the same heatsink for my Aleph60. There are four of them per channel (three devices/sink), the temperature is about 40 grades celsius. You can find the same heatsink profile used: http://www.aussieamplifiers.com/1kwamp.htm Try asking from the developer of the amp. By the way, I heard that the profile is called H10. Regards.

12th November 2002, 06:18 PM	#3
leroy diyAudio Member Join Date: Oct 2001	The dimensions of the heatsink you're displaying are comparable to Fischer's SK 144 sink which is rated at 0,55K/W for 75mm height. leroy

12th November 2002, 06:22 PM	#4
grataku diyAudio Member Join Date: Dec 2000 Location: -	joke, love your avatar! Uhmm, it somehow comes out sounding wrong... Anyways, what dondododnddo suggested would be more in line with my thinking. For a 300 watts monoblock...180 mm high...I would be inclined to say 6 so you need 12. Only four would make a nice stereo Aleph3 (200w total)

12th November 2002, 06:25 PM	#5
grataku diyAudio Member Join Date: Dec 2000 Location: -	joke, love your avatar! Uhmm, it somehow comes out sounding wrong... Anyways, what dondododnddo suggesed would be more in line with my thinking. For a 300 watts monoblock...180 mm high...I would be inclined to say 6. Only four would make a nice stereo Aleph3 (200w total)

12th November 2002, 08:17 PM	#6
joke diyAudio Member Join Date: Apr 2002 Location: Croatia	Thanks people ... you are killing me ... I was reali hopeing that this heatsink would be anough for aleph 4 at least ... Whell i will then builld aleph 4 and see if it gets to worm I will changed it to aleph 3 ... I have ollways know that this project loves aluminium ( Al ) but this much ( each heatsink is like 4.5 kg ) .... You just make my day bad ( and it was nice sunny day , birds ware singing ) Thanks regards Josip ...now back to colecting parts...

12th November 2002, 08:38 PM	#7
joke diyAudio Member Join Date: Apr 2002 Location: Croatia	Here I 'am again ... I just look at the fishers elektronik SK 144 and I think that my one heatsink have something like 0.25 C/W heat desipation maybe 0.22 C/W. http://www.fischerelektronik.de/_200...l_PDF/A_70.pdf

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