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Old 10th September 2008, 02:18 AM   #1
gionag is offline gionag  Italy
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Default F3/ZenV9 Enclosures...

Hi !
I'm looking around for a good enclosures for the Zen v9. In my country there's a big factory of these case named hifi2000.

For the project i'm intended to use a 4U case with two big heatsinks at the side:
PHOTO

THE MODEL IS 04/400 (4Unity - 400mm depth)

The dimensions of the heatsinks are : 400x160x40mm (each).

The thermal resistance of the Heatsinks are reported into the attached pdf (english version down the document). For this model is attested to 0.23C/W

Do you think that they are enough to cool down this beast ?

Thanks !
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File Type: pdf calcolo potenze dissipanti.pdf (27.5 KB, 135 views)
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Old 10th September 2008, 06:04 AM   #2
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I use the MODEL 04/400 for my aleph 30 and it's work fine.

The F3 consumes 200w (I read owner's manual http://www.firstwatt.com/downloads/f3_om.pdf), same Aleph 30

You should have no problems gionag
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Old 10th September 2008, 06:06 AM   #3
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Well I've got a 5U/400 case at home, and it cools VERY well (get's warm, not hot), so the 4U one should be OK too.

Two things to note about the 400mm depth units, is that the heatsinks are actually two smaller heatsinks mounted on the same bracket (so you'll end up using 1 heatsink for 2 transistors on each side).
The other is that the base is not very strong, and will flex quite a bit if you add large transformers and capacitors.
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Old 10th September 2008, 08:55 AM   #4
folkeb is offline folkeb  Norway
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A friend of mine uses the 3U version for his Aleph 5 and it seems to be handling the heat dissipation very well indeed. It is warm to the touch, but you can hold on to the heatsinks without it beeing uncomfortable.

I've just ordered a 2U and a 3U version to see which one will suit the F5 I'm planning to build.
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Old 10th September 2008, 09:04 AM   #5
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Quote:
Originally posted by gionag
to 0.23C/W
It should work for a V9, but you will find out that the thermal resistance of the heatsinks is not 0.23C/W
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Old 10th September 2008, 03:52 PM   #6
CeeVee is offline CeeVee  Portugal
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I was thinking of making my F3 with 2 of these....seem same dimensions as the original FW F3

I don't much like oversized boxes, if it can be avoided.

dimensions are 300x150x8 cm 0,25 ºC/W

http://www.mali-sp.si/images/artikli/tech/HR-245.pdf

would apreciate your opinions.
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Old 10th September 2008, 04:09 PM   #7
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High performance heatsink, comparable with Seifert KL271, has a slightly thinner base plate but 2 ribs more than the 271.

thermal resistance guestimate, corrected for a 50C heatsink temperature; 100mm: <0.25C/W
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Old 10th September 2008, 04:23 PM   #8
CeeVee is offline CeeVee  Portugal
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Hi Jacco,

Any idea of the price for Seifert KL271 ?
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Old 10th September 2008, 06:37 PM   #9
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IIRC, last year's GB at the German forum had a quote of ~€62 (2) and ~€45 (100) incl. tax.
Seifert has a dealer network, but they also sell direct.
If you do search you'll find the specs of the KL-271, likely also of the 272 and/or 273.
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Old 11th September 2008, 07:31 AM   #10
CeeVee is offline CeeVee  Portugal
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Thanks Jacco,

I did see the dealer network....but my german is null!
I'll try direct.
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