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San Ace's big brothers

post #1 of 7
Thread Starter 
Everyone loves the Sanyo Denki San Ace 9G1212H1011 fan, and for good reason: it is a nominally 2600 rpm fan that puts out 99 cfm while making only 39 dB of noise, and it undervolts nicely. Too bad it's so hard to get. The only source is in the UK, and it is often not in stock.

The only source in the US is from Newark Electric, which gives us the 9G1212H101, which has installation tubes, a.k.a. "ribs," and comes with bare leads; you must put computer fan plugs on them yourself.

For a long time I wondered about the -H's big brothers, the 9G1212E101 (3100 rpm, 118 cfm, 46 dB) and the 9G1212G101 (3600 rpm, 137 cfm, 49 dB), but where the -H is listed as operating from 7v to 13.8v, the -E and -G are listed as operating from 10.2v to 13.8v. I was unwilling to spend nearly $21 on a fan that would not operate down where its voltages would usually be. (ref.)

So I sat looking at those fans until in another thread on another forum a guy said he ran San Ace fans with nominal 10+ volts at 5v. Heck, he even ran 24v San Aces at 5v. So I ordered a couple of the H's big brothers. As luck would have it, not only does Newark offer the 9G1212E101 and the 9G1212G101, they also offer the 9G1212E1011- the one without ribs.

So I will now introduce the San Ace Brothers.

First of all, Newark charged me $5.65 to send two San Ace Fans through the mail. Here is what just the postage cost them:



That's right. $8.20. But Newark has never charged me more than $5.65. Go figure.

Here is the San Ace 9G1212E1011:


Exhaust view.


Intake view. Note the red dots.

Now for the 9G1212G101:


Exhaust view


Intake view. Note the red dot.

For comparison, the 9G1212H101:


Exhaust view


Intake view. Note the red dots. I'm guessing these have to do with balancing the fan.

OK. I modded my 9G1212H101 to make it a 9G1212H101(1) by cutting out the "ribs." Here you can see the 9G1212H101(1), the 9G1212E1011 and the 9G1212G101 side by side:



And their edges:



Hope you have enjoyed this little show-and-tell.

BTW - they all run just fine at 5 volts.
Edited by ehume - 4/10/10 at 8:27pm
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post #2 of 7
Awesome, thanks. Back when I was looking for the H1011 I was interested in the E1011, but not so much that I'd have preferred it over the H1011.
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by Chunky_Chimp View Post
Awesome, thanks. Back when I was looking for the H1011 I was interested in the E1011, but not so much that I'd have preferred it over the H1011.
I'm doing a second 12v run now. On the 5v run the -E1011 kicked butt and took names, but at 12v it gave me the same results as both my -G101's. But tonight my first -G101 run had really jagged temp lines - all of them. An invalid run, really. So I had to rerun. So maybe the -E1011 run was a preview for that. I'll know in a half hour.

In the mean time, the -G's are still the overall champ, performance vs noise. Have you looked at those Papst specs? No better cfm and a lot more noise.
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post #4 of 7
Quick question. Scythe Ultra Kaze 3000 is listed at 45 dB on newegg for cfm of 133. http://www.newegg.com/Product/Product.aspx?Item=N82E16835185054

Yet San Ace 9G1212G101 is listed at 47db for 137 cfm output. Could Scythe be fudging their noise numbers?
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post #5 of 7
Thread Starter 

 

Quote:
Originally Posted by DeadSkull View Post

Quick question. Scythe Ultra Kaze 3000 is listed at 45 dB on newegg for cfm of 133. http://www.newegg.com/Product/Product.aspx?Item=N82E16835185054

Yet San Ace 9G1212G101 is listed at 47db for 137 cfm output. Could Scythe be fudging their noise numbers?

 


Either that or Sanyo Denki is being conservative. I once saw a review that measured the UK3K at about spec. At least they're well made. Too bad about the bearings.

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post #6 of 7
How is the noise at 5v? Any whine, clicking, ticking etc?
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post #7 of 7
Thread Starter 

Some kind of clicking or something, lost in the airflow at full speed, evident at 5v. Loud if you set the fan down on a vibratable surface, like the metal top of a table saw.

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