CPU heatsinks in my Zen Amp
this is my first post on this forum.
Let me quickly introduce myself: I'm belgian (from Brussels, the capital of Europe, of waffels, of beers & of sprouts). I'm 33 years old, married, 1 little child and I work in IT for a bank (but I'm a physicist). I'm an "audiophile" but I'm not rich --> I'm a DIYer.
OK I stop now... I don't need a date :)
My first realizations: a wonderful "Bride Of Zen" preamp with external power unit (wonderfull compared to the preamp part of my NAD C312), a marvelous external power unit for my MSB Link DAC (based on the MSB P1000 model).
Now I'm building a ZEN amp (v1) to marry with my preamp. And of course, you understood: I made an external power unit ;)
For the heatsinks I choosed to use 4 CPU coolers (Zalman 5100 AlCu), one by transistor (2xIRFP9140,2xIRFP240). Of course I removed the 4 stock fans (too noisy) and I replaced it with 2 "silent" 8 cm PAPST fans ("12 dB" rated, let say 20 to 24 dB in the real life).
I made some calculations, each transistor should dissipate about 35 to 40 Watt, this is much less than a AMD CPU at 2 GHz (80 Watt :redhot:)... My silent fans don't cool as much as the stock ones, but it should be enough (I need about 1°C/W by heatsink and they are rated 0.4 °C/W with the noisy fan).
I didn't finish yet my amp so I didn't test it...
So my questions are:
Does somedy already try this cooling solution ?
What do you think about this ?
Dont'you think it's a good idea ? Are you interested by some pics ?
Why "Classe A" should always be synonym of "fu..ing heavy black heatsinks" ?
Why don't use the computer technologies progress for the HiFi ?
Millwood has posted a picture of his JLH 10W Class A with a pentium II heatsink... Since then I tried it too, I use a single AMD700MHz heatsink with 2 fans which are turning at a very low speed.. this cools my 2 channel MOSFET JLH 10W Class A just fine... goodluck,
So I'm not a genious...
thanks for the info.
I made some search on this forum and I saw that I was not the first to have this idea :idea:
Anyway it's a good news (even if I thought I was a genious :mad: ), it seems to work fine especially with Zalman heatsink and Papst fans !
Even Mr Pass tried and seems to think it's a good idea... the Force is with me :wiz:
So I'll try to finish my project quickly and I'll keep you informed...
Zalman CNPS 5100 Al-Cu
This is a picture of this cheap Zalman heatsink CNPS 5100-AlCu.
Of course you need 4 such heatsinks for a Zen v1 amplifier 2x10W...
and the silent Papst fan...
PAPST 8412 NGLE - 12 dBA
I use 2 of them (1 for 2 Zalman heatsinks).
Just "listen" to it... :shhh:
Re: Zalman CNPS 5100 Al-Cu
I have tried these:
Didn't go for it, was just too noisy, even with reduced voltage on the fans.
If it is too noisy, try even lower voltage till you get something like 100-200 rpm.. (? 4Volt?) but a real problem with 2 or more of this fans it their beating when their rpm is just slightly different..
I just finish my Zen amp (v1) with the 4 CPU heatsinks (pictures are coming soon...) yesterday. I married it with my BOZ and I made a first test and....UNBELIEVABLE !!! :yikes:
Even with a Sony Discman CD player as source , the sound is 10x more detailed than everything I ever heard ! (before I used the power amp part of a NAD C312 integrated amp).
Today I'll make a first test in my living room with my NAD CD player + MSB Link DAC. I'll sit down on the floor , this is safer...
I have a nice SOZ type using the Zalman "mushroom"
sinks mounted on an X1 chassis, but it's not done yet.
Picture will follow if you guys don't post it first. :cool:
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