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Old 20th November 2010, 06:35 PM   #421
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by vitalica View Post
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why you choose to use styrofoam between your mosfets and heatsink ?

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Old 20th November 2010, 08:03 PM   #422
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> why you choose to use styrofoam between your mosfets and heatsink ?

For once, I like your sense of humour.
Quite british, this one.




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Old 20th November 2010, 08:42 PM   #423
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Old 20th November 2010, 09:09 PM   #424
Salomon is offline Salomon  Germany
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Quote:
Originally Posted by mrivera982 View Post
I need that type of heat sinks. Where did you get them? That cabinet its looking really good.
I know, that you want to get the typ of heatsinks from vitalica.
But I will try to help you.

Maybe I use the same heatsinks you have seen in #389, but not so high.
My heatsinks are from seifert electronic >> KL-274
500 x 200 x 84mm 0,1K/W

Seifert-Electronic - Produkte
See my screenshot of the datasheet

You also get similar products from fischer electronic
See PDF Attachment

Sorry that I have only the german data.
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File Type: pdf 1105NH_Strangkk.pdf (143.1 KB, 92 views)

Last edited by Salomon; 20th November 2010 at 09:26 PM.
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Old 20th November 2010, 09:19 PM   #425
Salomon is offline Salomon  Germany
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Quote:
Originally Posted by Zen Mod View Post
why you choose to use styrofoam between your mosfets and heatsink ?

Your heatsinks get not so hot!!

I have really much fun here.
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Old 20th November 2010, 09:31 PM   #426
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fantastic information. thank you so much. Your help is very much appreciated.
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Old 21st November 2010, 06:07 AM   #427
EUVL is offline EUVL  Europe
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Salomon,

Firstly very kind of you to put up the link to Seifert. I have used them for years, and am a satisfied customer.

However, I wish to point out that the optimal height for these sinks are not necessarily 200mm. These welded fin heatsinks (whether from Seifert or Fischer) has a 12.5mm fin pitch (as opposed to many extruded sinks with 10mm pitch). The increased pitch reduced air flow resistance between fins substantially (by almost a factor of 2). Hence there is still substantial performance gain going from 200mm to e.g. 400mm. One can see that from the graph you attached in post #424. Whether it is necessary or not depends on how much heat you want to dissipate or how low a temperature you want on the sinks. Of course they cost more with a 400mm height.


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Old 21st November 2010, 01:08 PM   #428
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Hi all

Not a real finished amp BUT it's working !
Thanks to all especially to Mr Nelson PASS, BrianGT and to all the other folks who gave me a helping hand

New Aleph Mini PCB GB
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Old 27th November 2010, 05:09 PM   #429
Phill is offline Phill  France
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hello
I am a huge fan of these amps!!!
ZenV9
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Old 27th November 2010, 05:12 PM   #430
Phill is offline Phill  France
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Aleph 5

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