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High Speed Yate Loons?
- Thread starter Vipasnipa
- Start date
- Joined
- Dec 26, 2004
My question as well. I plan on getting high-speed Yates for my MCR220 in the future.
- Joined
- Oct 13, 2007
Noise might be an issue, the silent ones have a nice CFM/dB ratio if that kind of thing concerns you.
- Joined
- Nov 15, 2005
- Location
- Camarillo, CA!
hmm never heard that running a fan at a slower speed was harder on the bearings and motor?
- Joined
- May 15, 2006
Yes, totally worth buying the high speed ones and slap them on a fan controller, they work GREAT. Want to know why?
The high speeds ones don't have a resistor in the fan like the medium/low speed ones. So...essentially, your getting an "unlocked" fan.
- Joined
- May 24, 2005
Yip, that is correct:
At less voltage the fan will try to draw more current to maintain more or less the same power level. More current means more motor vibration, which equals noise and degraded lifespan. Hence the drone you hear when you undervolt powerful fans like tornados
Undervolted fan has less torque on spinning the blades than the one made for that speed.
Compared to the one that made for that speed, the undervolted fan at that lower speed will not be stable, for example a slight changes at the air flow like blocking its way at the exhaust or at it's intake might affect it's speed & pressure greatly.
Compared to the one that made for that speed, the undervolted fan at that lower speed will not be stable, for example a slight changes at the air flow like blocking its way at the exhaust or at it's intake might affect it's speed & pressure greatly.
- Joined
- Dec 26, 2004
bing and aja:
If the fans are what thideras has said (the medium and low speed fans are the same as the high-speed with a resistor in-line), then the blades won't suffer from a torque difference, they are the same fans physically, only electronically (and very slightly at that) do they differ.
How do most rheobuses work (not PWM controllers)? Do they limit voltage, or do they act like resistors and limit current?
If the fans are what thideras has said (the medium and low speed fans are the same as the high-speed with a resistor in-line), then the blades won't suffer from a torque difference, they are the same fans physically, only electronically (and very slightly at that) do they differ.
How do most rheobuses work (not PWM controllers)? Do they limit voltage, or do they act like resistors and limit current?
- Joined
- May 12, 2005
- Location
- Home... again
the high speed ones are quiet also considering their cfm
resistors as far as i know, and they generate heat
For sure here is "NO" resistor-ed circuit at the lower speed fan, they use different electronic & magnetic components !
Rheobus is basically high wattage potentiometer and works straight as adjustable resistor to limit the current flows hence "indirectly" control it's output voltage or as an adjustable voltage divider (electronic speaks) to adjust the output voltage. Two different types of uses, the 1st one is used most of times for controlling fan.
This is the most primitive form of voltage/current control.
Last edited:
- Joined
- Dec 26, 2004
Well... the most primitive form of voltage/current control is a resistor (or a potentiometer, if you need variable).
But I see your point. I've never used any of the 3 Yate Loons in question, so I don't know if they're different or not.
- Thread Starter
- #15
Getting mixed messages here. These are the ones I'm talking about: http://jab-tech.com/YATE-LOON-120mm-Case-Fan-D12SH-12-High-Speed-pr-3771.html
- Joined
- Dec 26, 2004
Do Yate's act nicely with PWMs? Lots of fans suffer from clicking with a PWM controller. Most fans, IIRC, don't play well with PWM controllers.
- Thread Starter
- #20
Well, I got said Yates and a kick-*** sunbeam rhebos because Jab-Tech and USPS Priority Mail rock. My report follows thus.
Holy excrement, Yates push a ton of air for the decibels. Just below 7V when the Sunbeam changes the LED from blue to red, it still pushes plenty of air but is completely silent. I'm going to get 4 140mm Yates and an additional Sunbeam rhebos for my on-route CM 690. Lots of cooling, little noise.
Also, Jab-Tech rules!
Holy excrement, Yates push a ton of air for the decibels. Just below 7V when the Sunbeam changes the LED from blue to red, it still pushes plenty of air but is completely silent. I'm going to get 4 140mm Yates and an additional Sunbeam rhebos for my on-route CM 690. Lots of cooling, little noise.
Also, Jab-Tech rules!
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