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The following page was printed from RemoteCentral.com:
| Topic: | Loud Fan This thread has 19 replies. Displaying posts 1 through 15. |
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| Post 1 made on Thursday April 4, 2002 at 15:16 |
arni Founding Member |
Joined:
Posts: | March 2002
14 |
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I am using an External fan to cool my components in an enclosed cabinet. It is a 3or4inch fan from Radio Shack, the problem is it is very loud any suggestions would help.
Thanks
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| Post 2 made on Thursday April 4, 2002 at 17:05 |
Spiky Founding Member |
Joined:
Posts: | May 2001
2,288 |
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Get a quiet computer fan or 2. Computer supply stores should have them for under $10.
Got mine for $9 each from pcpowercooling.com. Silencer was the model name.
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| Post 3 made on Thursday April 4, 2002 at 22:15 |
Jeff406 Founding Member |
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Posts: | August 2001
55 |
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I ocasionally use the inexpensive computer fan from Radio Shack, but you did not say if you are using the 110V version or the 12VDC one. The 110V fan is very loud, but I have had good success with the 12VDC one and it being fairly quiet in a closed cabinet, but you obviously need a 12V transformer to hook up to it.
Jeff
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| Post 4 made on Sunday April 7, 2002 at 12:25 |
Matt Founding Member |
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Posts: | August 2001
1,802 |
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You could slow the fan speed down by shunting a capacitor across the power supply..
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| Post 5 made on Monday April 8, 2002 at 17:31 |
automan1 Founding Member |
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Posts: | April 2002
393 |
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You could slow the fan speed down by shunting a capacitor across the power supply..
What would a cap. in parallel with the fan do? how would it slow it down?
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| Post 6 made on Monday April 8, 2002 at 23:22 |
Matt Founding Member |
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Posts: | August 2001
1,802 |
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shunt, parallel, same thing...
It will store some of the energy normally applied to the fans motor.
This message was edited by Matt on 04/08/02 23:22.58.
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| Post 7 made on Tuesday April 9, 2002 at 14:14 |
automan1 Founding Member |
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Posts: | April 2002
393 |
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How does putting a cap. in parallel with a DC fan slow it down?
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| Post 8 made on Tuesday April 9, 2002 at 17:50 |
Larry Fine Loyal Member |
Joined:
Posts: | August 2001
5,002 |
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If we're talking about a DC supply, a parallel cap is a typical filter cap. It could possibly cause a fan to quiet down slightly by smoothing the unfiltered pulsating DC, but, with a small (relative to the supply's capacity) load, the filter cap charges up to the peak voltage (RMS x 1.414), which probably would not slow the fan at all. Larry www.fineelectricco.com
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| Post 9 made on Tuesday April 9, 2002 at 19:26 |
automan1 Founding Member |
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Posts: | April 2002
393 |
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DC is DC, pulsating DC pulsates, they are not the same thing. I wouldn't feed a DC fan with pulsating DC and call it DC.
Weather the source is DC or pulsating DC, a capacitor in parallel with it will not slow it down.
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| Post 10 made on Tuesday April 9, 2002 at 21:14 |
Matt Founding Member |
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Posts: | August 2001
1,802 |
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I was talking AC fan...sorry if I misposted.
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| Post 11 made on Tuesday April 23, 2002 at 05:13 |
Sheik_Yerbouhti Founding Member |
Joined:
Posts: | April 2002
401 |
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arni: Try remoting your fan with flexible dryer ducting - I did and it's quiet. Flexible ducting will decouple the fan so your pipe won't become an echo chamber. I won't bore you with the highly detailed installation. Suffice it to say that I go out of the cabinet, into a wall cavity that is my HVAC return air duct, and exhaust into my garage. Good luck.
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You are transparent! I see many things;
I see plans within plans. The Spice must flow! |
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| Post 12 made on Friday April 26, 2002 at 16:09 |
ivan Founding Member |
Joined:
Posts: | February 2002
39 |
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I also use good quality computer fans. I have a couple of DC fans with heat sensors built in. You can find these on the net if you look for variable speed PC fans. In addition, these are often 12 volt fans, You can slow them down more if needed by using an adjustable power supply. I am running these at 9 volts for top speed. Dropping from 12 volts to 9 volts slows the fan and makes it even quieter. Idle speed is quite low, and quiet. If things heat up, the fan speeds up.
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| Post 13 made on Wednesday May 22, 2002 at 08:03 |
McNasty Founding Member |
Joined:
Posts: | January 2002
1,322 |
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We use fans a LOT. Some of our clients want there systems in really tight cabinets and I have installed four (YES, THE BOSS WANTED FOUR) 4" fans in one cabinet. I got them almost dead silent by putting a diagonal bead of clear silocone on each corner and then running a 12VDC fan at 6VDC. It is quite and moves a lot of air.
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| Post 14 made on Thursday May 23, 2002 at 19:52 |
McNasty what kind of fans did you use, brand, place to buy etc..
I'm going to check out pcpowercooling.com, as recommended above.
I'm a little confused where did you actually put the silicone.
I have been wanting to a add a fan for a little while now.
Will they turn on at a certain temp, or is it easier to plug them into a switched outlet on main receiver?
thanks
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| Post 15 made on Friday May 24, 2002 at 06:49 |
McNasty Founding Member |
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Posts: | January 2002
1,322 |
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Bill,
I'm not sure what brand we use, but I'll check the van today to see what they are. But they are basically generic 4" and 3" square black 12V fans. We actually use 3" on the job a last wrote about not 4" I made a typo...But anyway, as for the silicone. On each corner of the fan there is a screw hole, and each if you look where that hole is it kinda looks like a triangle pad. I put the silicone bead right there. I figure the less surface area there is that touches, and the more vibration it absorbs, the quieter it will be. (Kinda like an engine mount)
And to answer your power question, we always put them on the recievers switched outlet.
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