Fan help needed

[Waterlogged]

Normally, I wouldn't bother asking this but I have some very special requirements and all I can find are fans that cost more than I'm really willing to pay.

What I need is 2 fans that are 120x25, quiet, good on rads (BIP in this case, so 50-60 CFM), open holes (not closed like YL's), and have a max draw of .2A. Is there anything under $10 available? All I'm finding are $12 and up. I think Petra's has spoiled me with their Yate Loons.

[hellcamino]

http://www.newegg.com/Product/Produc...82E16835185077

Those should suit. They are right on .2a draw though.

[Waterlogged]

http://www.newegg.com/Product/Produc...82E16835185077

Those should suit. They are right on .2a draw though.

Those are 100x25.

[Hondacity]

go to newegg.com

set filters 0-10$ , size=120mm

there are tons there...i just tried it..lotsa good choices

[hellcamino]

Bah, I thought I had the filter set to 120mm...my bad.

[hellcamino]

Looking around it looks to be a tough order to get a 120mm fan that will push 50-60cfm at under .2a let alone doing it cheaply or quietly. What is special about this project that requires such low power fans?

http://www.newegg.com/Product/Produc...82E16835186015

That's about the best I see inside your limits but I've never used them.

[SNiiPE_DoGG]

you know its about a 10 minute dremel job to turn those closed corner yates into open corners right?

nourish the modder inside you

[Lsdmeasap]

you know its about a 10 minute dremel job to turn those closed corner yates into open corners right?

nourish the modder inside you

I was about to suggest the same as I just did it myself as I ordered them without noticing they were closed

[hellcamino]

The yates are over .2a draw.

[SNiiPE_DoGG]

but what kind of controller will waterlogged be using?

a)fans draw 20-30% less than their rated current while running.

b) A PWM circuit connected to fans drawing more current than it can handle will just lower the speed of the fans by supplying less current, you can hook up 6 yates to a 1a PWM and they will just run slower at maximum current supply

[axis]

you know its about a 10 minute dremel job to turn those closed corner yates into open corners right?

nourish the modder inside you

+1, the first thing I thought of after reading your requirements

The yates are over .2a draw.

That's what the manufacturer rates them at MAX draw. I've seen tests that show them using considerably less at max speed.

Axis

[Eddie3dfx]

Normally, I wouldn't bother asking this but I have some very special requirements and all I can find are fans that cost more than I'm really willing to pay.

What I need is 2 fans that are 120x25, quiet, good on rads (BIP in this case, so 50-60 CFM), open holes (not closed like YL's), and have a max draw of .2A. Is there anything under $10 available? All I'm finding are $12 and up. I think Petra's has spoiled me with their Yate Loons.

yate loons also have open as well.
I think the jab-tech yate open yates are fairly quiet. Max draw .2... hmm.. not sure. my blue led 88cfm yates are at .3

I think it was vapor who wrote that the fans don't come close to their rating.

[Ozzfest05]

I just got my yates and had to mod them to open chamber I used vice grips to break the chamber and dremeled out the rest

[aajj7733]

if you run them at a very low voltage then they will hit the specified current

[Vapor]

Zalman F3s with the included resistor?

(or without the included resistor...without is a little too fast for your 50-60CFM range, but with is below that IIRC).

[Quad-Damage]

I have 5 x Scythe S-FLEX SFF21E with no controller, They are not loud but if you get close you can hear them.

They are 49cfm and 24ish db 3x on a swifttech works great for me

might want to go with the Scythe S-FLEX SFF21F with a fan controller.

[warriorpoet]

you know its about a 10 minute dremel job to turn those closed corner yates into open corners right?

nourish the modder inside you

It's 2-3 mins. if you just crush 'em with a pair of pliers

[NaeKuh]

Zalman F3s with the included resistor?

(or without the included resistor...without is a little too fast for your 50-60CFM range, but with is below that IIRC).

+1

id go with zalmans WL.



Sharkoon Golfballs would be a very close second.

[Waterlogged]

go to newegg.com

set filters 0-10$ , size=120mm

there are tons there...i just tried it..lotsa good choices

Hmm, kind of forgot about the Egg. Took a preliminary look and there might be a few that might work. Thanks.

you know its about a 10 minute dremel job to turn those closed corner yates into open corners right?

nourish the modder inside you

Yeah, I opened up a pair 20mm thick Yates recently to put on my TRUE, that's not really the problem. I'd just like to avoid the extra 2 minutes worth of work if possible.

The yates are over .2a draw.

All my Yates are saying .3A on them.

but what kind of controller will waterlogged be using?

a)fans draw 20-30% less than their rated current while running.

b) A PWM circuit connected to fans drawing more current than it can handle will just lower the speed of the fans by supplying less current, you can hook up 6 yates to a 1a PWM and they will just run slower at maximum current supply

I was wondering if anyone would ask this. This is what I plan on using to control the fans, completely autonomous. I also have a Super Flower SF-610 that will be monitoring RPM's among other things.

Zalman F3s with the included resistor?

(or without the included resistor...without is a little too fast for your 50-60CFM range, but with is below that IIRC).

Well, a little faster isn't going to hurt anything really, I just wanted to make sure the fans would hit the sweet spot on the BIP. Probably should have worded that better in the OP. From what I can tell, they have a max draw of .35A, I'm guessing that would be startup @ 12V.

Sharkoon Golfballs would be a very close second.

I've always been curious how well those worked but, @ ~$19 per fan...I'm sorry to say, I'll stay curious. I'd get more S-Flex before I get those.

[SNiiPE_DoGG]

ok, so that mini controller is definitely a PWm circuit, the question is how much does it alter the fan? you might even be better off going with yate high speeds depending on how much it throttles the fan... this is gonna take some testing on your end to truly decipher.

the question is what do yate loon mediums spin at (rpm) when @ .2a supply current and what do yate loon Highs spin at when @.2a supply.....

[Vapor]

EDIT: retested....seems the mA setting on my DMM adds a bit of resistance and was hurting numbers...

Changed to the unrestricted 10A setting (less precise) and got .36A startup and .25A running. Both are past the .21A max of that controller.

With the resistor (found 1!): .13-.14A startup and .11A running

[Vapor]

S-Flex series has circuitry to retard the startup load it seems....S-Flex E climbs from .03A to .10A in the first second and then settles down to .08A.

S-Flex F goes from .04 -> .14ish -> .10A

[fox3]

S-Flex series has circuitry to retard the startup load it seems....
S-Flex F goes from .04 -> .14ish -> .10A

Timing could not have been better with this information, Thanx Vapor.

I am planning (4) S-Flex F fans on one cannel with my Aquaero and the channel constraint is 10W MAX. The 4 fans would be 9.6W and I thought the extra transient surge would put them over 10W.

A circuit to retard startup load is not new to me, I know some of my power tools like my router does this to help control torque on startup.

[Waterlogged]

ok, so that mini controller is definitely a PWm circuit, the question is how much does it alter the fan? you might even be better off going with yate high speeds depending on how much it throttles the fan... this is gonna take some testing on your end to truly decipher.

the question is what do yate loon mediums spin at (rpm) when @ .2a supply current and what do yate loon Highs spin at when @.2a supply.....

You know what?..I've got 2 YL SH's here that I was going to use on this rig until I came up with this idea. I'll test them out and see what they run at. Setting up my YL's like the F3's will save me at least $20 which I could really use right now.

From what I can tell by one of Newegg's pics, the F3 uses a 1/4watt, 56 ohm±5% resistor, can someone confirm this?

[Waterlogged]

Well, looks like choking the YL's may not be such a good idea considering the numbers I just got. For a starter load of .2A, it'll have to run @ 6.41V. After startup, it settled down to .11A. At 12V, it jumped to .33A-.34A then settling down to .2A. Looks like YL are pigs at startup.