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Cooling Fan
#98921 06/16/05 04:35 PM
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bigjohn Offline OP
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i know a few of you guys have talked about external cooling fans to help in keeping your receivers from getting too hot. i have decided to get one as a precautionary measure, but i have a question about how to use it.

i will obviously place the fan on the top of the receiver, towards the rear where the little slits are in the metal.. but, would i want to place the fan blowing DOWN, to blow cool air into the unit..? or, would i want to place the fan blowing UP, so it will suck the hot air out of the unit..? do i make sense..?

any help or suggestions would be appreciated..

bigjohn


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Re: Cooling Fan
#98922 06/16/05 04:45 PM
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I think you want to suck instead of blow (age old question of which is worse comes to mind...).

I believe the units are designed to use convection to let the hot air rise out of the top vents; I'd think it better to reinforce or accelerate that design principle rather than turn it upside-down.

Does your receiver get hot?

I have a Denon 1804 with only about 2" of space on top/sides, inside a glass-front cabinet. Even after playing movies at loud volumes, it isn't anything beyond "warm". I mean, I applaud your conscientiousness, but I just don't have the outlets or time to wire something else up, and I'm concerned that the potential noise is going to irritate me beyond the benefit. I'm also concerned about forcibly drawing dust through the receiver; the fans on my computer get much nastier looking than my hi-fi gear ever does.


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Re: Cooling Fan
#98923 06/16/05 04:54 PM
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Hey John, what kind of fun are you getting? DC or AC? Or powered through USB port of some other device? My Rotel RB-1080 power amp gets really hot (though never has shut down) and I want to buy one myself.

I posted something similar on Club Rotel shown on This Link It has a lot of info, and I was really impressed with DIY work of PewterTA in that forum. You may wanna check that for ideas, however, I am not able to do any of those myself for now. I am looking for something simplier.


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Re: Cooling Fan
#98924 06/16/05 04:59 PM
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axiomite
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Easy. Just buy a cool running power amp and plug it into your preouts. Problem solved.

Oh yeah, never mind. The fan is a little cheaper. . .


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Re: Cooling Fan
#98925 06/16/05 05:01 PM
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bigjohn Offline OP
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thanks for the advice.. my first impression was to suck the air out, but i just wanted some back-up for my idea.

my Onkyo does get a little hot during high volumes on long movies, but it isnt horrible. and it is hot, not just warm. it is uncomfortable to put your hands on it for more than 5-7 seconds. it wont BURN you or anything, but it is definitely more towards hot than warm.. sorry, i am jabbering.. anyway, here is why i am thinking about getting the fan.

right now, because i have cable, and limiting inputs on my TV, i dont use the receiver for normal everyday TV watching. i just use the speakers on the TV, and only use the receiver for listening to cd's, or watching movies on DVD.. so at best, the receiver is only on for 2-4 hours at a time, maybe more on the weekends. but, i am fixing to get a satellite dish, and i will connect it thru the receiver, and then to the TV.. so, pretty much, whenever the TV is on, the receiver will be on. so, it will go from being used 2-4 hours a day.. to being used 6-8 hours a day, depending on how much TV is watched when i am at work. so, as just a safety measure, i would like to get the fan to combat any stress from heat that might occur.

i am just gonna plug it into the dedicated socket on the back of the unit.. so, when the unit is on, the fan is on.. unit off, fan off.. easy...

EDIT- thyname, DC all the way.. its just easier..there is a little mom & pops electrical shop here in town that already has the fans with plug-in cords attached for real cheap..

bigjohn

Last edited by bigjohn; 06/16/05 05:06 PM.

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Re: Cooling Fan
#98926 06/16/05 05:09 PM
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My only concern would be noise. I think with the $ you already have invested in the rest of your equipment, it may be wise to nab one of those 2 channel Onkyo amps to power the mains. $200, I think.

Re: Cooling Fan
#98927 06/16/05 05:12 PM
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bigjohn Offline OP
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that makes two replies with concerns about the noise from the fan..? are the fans THAT loud..?

i might have to get one from that store, and bring it home and see just how loud it is.. they will let me do that before i buy.. gotta love hometown service..!!

bigjohn


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Re: Cooling Fan
#98928 06/16/05 05:13 PM
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axiomite
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Aha, see? I was serious after all. . .

My HK 7200 is a small heater in my room. Enough so that it is uncomfortable to watch movies in the summer. I've added an external power amp and it really does take the majority of the load off the receiver.


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Re: Cooling Fan
#98929 06/16/05 05:36 PM
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In reply to:

EDIT- thyname, DC all the way.. its just easier..there is a little mom & pops electrical shop here in town that already has the fans with plug-in cords attached for real cheap..




I don't have a DC power source though. Anybody any idea on where to find a DC cooling fan with its own DC power source/adapter?

Thanks a lot!!



Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3
Re: Cooling Fan
#98930 06/16/05 05:41 PM
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bigjohn Offline OP
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dude, i had a brain fart man..

i meant AC, just a straight 110 plug, like going into the wall.

geez, i screwed the pooch on that one..

bigjohn


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