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Message |
    
Jameslarson
Intermediate Member
Username: Jameslarson
Post Number: 288
Registered: 4-2006
| | Posted on Monday, April 02, 2007 - 9:56 pm: | 
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Ok, I want toput a fan on my 667. Should I have it where it blows the air towards the heat sinks, or away? I was thinking away because it would take the heat away from the amp. Let me know. Thanks. |
Romstar
Member
Username: Romstar
Post Number: 63
Registered: 3-2007
| | Posted on Monday, April 02, 2007 - 11:39 pm: |
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From my experience it would depend on the speed and size of the fan.
If it is a high speed fan, I have them blowing air into the heat sinks.
If it is a medium or slow speed fan, I have them pulling air through the heat sink and away from the unit.
Again, these are my personal experiences.
Romstar |
Tech808
Moderator
Username: Tech808
Post Number: 13382
Registered: 8-2002
| | Posted on Monday, April 02, 2007 - 11:44 pm: |
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Personally I have always mounted fans if needed with the air being pulled across the cooling fins and drawing the hot air off the fins.
It can be a 50/50 answer depending on how big of fan you plan to use to keep it cool and how you personally use the amp, ie: input power, dead key power and output power and running it at 50 to 75% or running it at 100%.
I have personally never found a reason to run any amp at full power.
If I needed more power I just got a bigger amp so I do not have to run it at 100%.
Just my own personal experience.
Lon ~ Tech808 ~ N9CEF
CEF#808 ~ CEF HAM#33 ~ CVC#002
10-10 #61493 ~ 10-10 VP#2688
Tech808@copperelectronics.com
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Bullseye
Intermediate Member
Username: Bullseye
Post Number: 289
Registered: 1-2002
| | Posted on Tuesday, April 03, 2007 - 12:01 am: |
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If you put it blowing into the heat sinks it will spread heat through the rest of the amp and if it is pulling air across them it will also draw heat from the rest of the amp. and help keep the whole thing cooler.
Bullseye/CEF#110/Mem. Since 1/18/2002
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Romstar
Member
Username: Romstar
Post Number: 64
Registered: 3-2007
| | Posted on Tuesday, April 03, 2007 - 2:19 pm: |
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How can you blow air into a cabinet through a solid heatsink? Perforated yes, but not solid.
I wish I could just draw a diagram, but if a fan is mounted on top of the heat sink fins blowing air into the sink, the air will pick up heat, and blow out the ends of the sink front and rear. Or side to side, depending on how it's mounted.
I take it the heat sink on a 667 is on the rear of the unit? I don't have one, and I can't find pictures of it, but it would seem to me that it would be a solid heat sink.
Romstar |
Kabar
Junior Member
Username: Kabar
Post Number: 21
Registered: 6-2003
| | Posted on Tuesday, April 03, 2007 - 6:50 pm: |
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Try it both ways.
You may find that the fan noise is less in one direction than in the other.
I position my fans for the least amount of fan noise.
I think one direction is good as the other.
Just my opinion. |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 2467
Registered: 9-2004
| | Posted on Tuesday, April 03, 2007 - 11:20 pm: |
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romstar,
the heatsink on the texas star amps may look like it is solid, but it is not.
if you were to look at the side of the amp you would see all the ends of the fins, just like looking at the front of most amps.
texas star just turns them sideways, and incorporates the front faceplate into the front of the heatsink.
get a suitable fan, i like the hardrive style fans that are attatched to a small heatsink.
just bolt the new heatsink with fans to the bottom of the amp, blowing upward.
mount the amp so the bottom is free, and hanging.
then the air will be directed up and out the sides of the fins.
this will work great as long as you dont want to set the amp on the desk.
later,
matt
anyone wanting a "clean signal", just look to the left and build one of these!!!
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Romstar
Member
Username: Romstar
Post Number: 67
Registered: 3-2007
| | Posted on Wednesday, April 04, 2007 - 7:41 pm: |
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I have seen thousands of heat sinks. There are several types, although the two most common are the finned solid plate, and the finned perforated plate.
I certainly never expected they would use a solid block without fins.
What I mean is that I doubt it's full of holes letting air inside of the case.
Of course, I haven't seen one in person up close.
Romstar |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 2472
Registered: 9-2004
| | Posted on Wednesday, April 04, 2007 - 9:36 pm: |
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romstar, you are correct.
they are not full of holes allowing air to flow into the case.
sorry if i misunderstood you.
matt
anyone wanting a "clean signal", just look to the left and build one of these!!!
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Romstar
Member
Username: Romstar
Post Number: 68
Registered: 3-2007
| | Posted on Wednesday, April 04, 2007 - 11:03 pm: |
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No problem at all.
Romstar |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 3591
Registered: 7-2004
| | Posted on Saturday, April 07, 2007 - 2:10 pm: |
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jameslarson, get 2 small fans that will fit on the bottom of your 667. highest CFM @ 12v you can get. force those plastic 'molys' (that are used to put a screw into sheetrock) in between the fins. put 1 fan facing up & 1 fan facing down. |
Carolinagold
Member
Username: Carolinagold
Post Number: 72
Registered: 12-2002
| | Posted on Sunday, April 08, 2007 - 1:20 pm: |
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Jameslarson... you can also get two fans from a pc off the proceser and face them pulling air away from the fins of the heatsink. because if it is pulling cool air into the heatsink then it has to be pulling hot air out. it works the same way as a 12v cooler that you can buy from any truck stop. it pulls air away from the heatsink to make it cool and blows air across the heat sink to make it warm. and it pays to space the fans about 1/4" away from the heat sink if not then all your going to do is be listning to a fan and serving no purpose. |
Hotwire
Senior Member
Username: Hotwire
Post Number: 2196
Registered: 1-2005
| | Posted on Sunday, April 08, 2007 - 1:58 pm: |
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James, Interesting question! I run the Texas Star model DX500, same cabinet as the 667. What I have always done is use the brushless dc computer fans attaching them to the heat sink with the "molys" . Fans blowing into the heat sink.
So I have thought about this in the past myself. Here is the conclusion I came up with. I want max air flow. The heat sink is on the bottom of the 667. We all know that heat rises. I thought that it would be easier for the fan to push cool air up into the sink and hot air out the rear of the amp, especially using the supplied mounting bracket that covers up 1/4 of the heat sink.
If you look at the Texas Star amps closely you notice that the faceplate hides the heat sink in the front actually restricting airflow.
I mount the amp with the supplied bracket with just enough room in the front for a fan to be placed there. With the bracket in place its kind of like an air tunnel through the sink. Cool air going in the front and hot exhaust out the back.
Now I did try it in reverse and I did not seem to feel the same amount of warm exhaust as before. Not saying it won't work I just think that fans blowing in is more effective and faster for that model amp because heat rises.
Kenny
cef491(27.115lsb)
2sf491(27.555usb)
Indiana
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Jameslarson
Intermediate Member
Username: Jameslarson
Post Number: 300
Registered: 4-2006
| | Posted on Sunday, April 08, 2007 - 9:34 pm: |
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Sounds like a plan. I'll be sure to stand off the fans 1/4" away from the heat sink. |
Carolinagold
Member
Username: Carolinagold
Post Number: 73
Registered: 12-2002
| | Posted on Sunday, April 08, 2007 - 10:02 pm: |
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it will cool the amp either way. but if it is pulling air away from the amp then it will run cooler and cool off faster but all my amps have fans that pull air away from them and i can tell a big differance. but either way will work. good luck JAMES |
Dale
Advanced Member
Username: Dale
Post Number: 738
Registered: 12-2002
| | Posted on Monday, April 09, 2007 - 11:21 am: |
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i think its a 50/50 thing also id try it both ways with however ya run your equiment and just
use which ever works best for you
dale/a.k.a.hotrod
cef426
cvc#64
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Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 2477
Registered: 9-2004
| | Posted on Monday, April 09, 2007 - 9:35 pm: |
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i am still running the same old KL300p in my mobile that i have been for about 2 years.
(i must say, these are great little amps for the money! very rugged IMO)
anyway, it used to get really warm after a 2 minute or so keyup. (i tend to get longwinded, as if you guys didnt already know that.LOL)
i bought one of those computer fan setups for about $10.00 that has two fans one in front of the other mounted to a small heatsink that looks kinda like the KL300p in a way.
i bolted it to the top of the amp, (heatsink is on top) and have it blowing into the heatsink.
it blows air out the front and the back of the heatsink, and it works great!
my amp does not heat up anymore.
it stays nice and cool.
just my experience.
later,
matt
anyone wanting a "clean signal", just look to the left and build one of these!!!
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