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Unread 09-23-2001, 07:58 AM   #1
the creature
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Default 230V FANS

Are the 230V fans quieter then the 12V DC fans, at the same size (120mm), rpm osv?

Where can you get suche fans?
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Unread 09-23-2001, 02:19 PM   #2
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i THINK Radioshack sells 'em, but I don't know about all the other info...
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Unread 09-23-2001, 06:57 PM   #3
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No difference, they just use AC power instead of DC.

Obviously you have to be in a place that uses 230V power to use them, but they should be identical to same brand 110v fans for people in the US.
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Unread 09-24-2001, 07:48 PM   #4
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AC fans make no difference with DC fans if you consider performance / noise. Ball bearing/brushless DC motors are silent enough so AC motors (quite silent already) have no edge there.
What you'll end up with AC fans is:
good: No power drain on your PSU
bad: an AC variator is quite bulky and/or difficult to build. Must use a PWM or any 'smart' AC/AC technique... definitely not for the faint hearted.

If PSU power drain is your main concern so go for them, they're even cheaper than their DC counterpart (due to the AC motor). You can find em in the same places where you buy your usual industrial hardware.

Redleader: Look he's from Norway... They've got 230V out there

[ 09-24-2001: Message edited by: SureFoot ]
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Unread 09-26-2001, 12:34 AM   #5
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:o
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Unread 09-27-2001, 06:47 AM   #6
the creature
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It's only US and Canada that has 110V!
I didn't understand why I should bild a ac/ac
converter, since I got 230V.

Since AC fans aren't any beter then dc I'm going to chose dc, because thay got the hall-wire and I can controll the rpm easier.
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Unread 09-27-2001, 08:41 AM   #7
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Yep i meant AC/AC converter would be there to adjust fan speed.
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Unread 09-28-2001, 12:13 AM   #8
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Woo hoo! first post!

From my experience with 240V fans (in australia) is that they have a huge centre section (where the motor resides) and tiny fan blades.
They tend to generate much more heat than the 12V, and can make case temps jump up by a few degrees, which may not be what you want.
I have also found most of the cheaper 240V fans to be noisier unless you do go for the option of speed controllers, which just add on an unnecessary cost and effort to the system.
Not to mention that the 240V fans are generally much thicker and heavier than the 12V fans.

My 2c tho
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