Are you hot?

[DonBattles]

Since I have stepped into the arena of HT and music listening on a more active level I have noticed my AVR's temp. is what I would think to be on the high side. For the record its an Onkyo TX-SR605. So I placed a temp. probe on it today while I was listening to some music, approx. two hours. When I checked the temp. it was 110.4 degrees, not smoking hot but maybe a fan of sorts would be best as we all know heat and electronics are bad. So again I ask, are you hot?

 

[mike c]

yes, i'm super hot but i'm also very cool at the same time.

you can use a PC fan wired to an AC to 12v DC adapter and then plug it into the switched outlet of your receiver, that way, it'll be on the same time your receiver is on.

http://forums.audioholics.com/forums/showthread.php?t=39279&highlight=12v+fan

 

[Adam]

...it was 110.4 degrees...

Two questions:
1. Where was the probe?
2. Is that in Fahrenheit or Celsius?

yes, i'm super hot but i'm also very cool at the same time.

Mike is icey hot.

 

[mike c]

Two questions:
1. Where was the probe?
2. Is that in Fahrenheit or Celsius?


Mike is icey hot.

110 celcius would probably melt the receiver insides.

how does it look in fahrenheit?

thank you.

 

[Adam]

110 celcius would probably melt the receiver insides.

I asked as a follow up to the first question, wise guy. 110 Celsius is extremely hot for ambient air, but not very hot for certain component cases.

EDIT: You got Alex's 1000th thanks for that one - kudos!

 

[mike c]

no i meant, i don't know how fahrenheit works ... does it get warmer as it goes higher? (im thinking opposite)
[what a nightmare looking at the local news when i was in vegas, is it warm or cool outside? i dunno it's 50 bejewels in temperature outside]

but yeah. those people who invented: metric and english measuring systems, 110v and 220v, fahrenheit and celcius, etc. should all be crucified for not going the way of HD DVD and BD.

 

[Adam]

Fahrenheit goes up as it gets hotter, just like Celsius.

A real easy converter between F and C can be found here. I didn't want to assume what Don was saying, but 110 F is about 43 C, and 43 C ambient air is not hot at all for most electronics.

 

[DonBattles]

Fahrenheit goes up as it gets hotter, just like Celsius.

A real easy converter between F and C can be found here. I didn't want to assume what Don was saying, but 110 F is about 43 C, and 43 C ambient air is not hot at all for most electronics.

Adam, that's 110 F and it was measured by placing the probe on top of the right rear corner of the receiver as this is where most of the heat seemed to be. And while 110 may not be considered bad my comparison was between this Onkyo and the Kenwood I had before. The Kenwood never seemed to be much warmer than body temp.

 

[Adam]

Hey, Don. Thanks for the update!

It's hard for me to say if that temperature is an issue. My gut feeling is no. Most commercial-grade electronics are rated to work at ambient temperatures of 70 C (about 160 F). It's not that simple in reality, as surrounding electronics play a role in heating up components, but that's a good first way to think about it. I know that the internal air temperatures are higher, but it seems okay to me.

Like Mike said, though, a fan would work great to reduce the air temperatures around the unit.

My Pioneer feels quite a bit warmer than that to me, but I haven't measured the temperature.

 

[TLS Guy]

Hey, Don. Thanks for the update!

It's hard for me to say if that temperature is an issue. My gut feeling is no. Most commercial-grade electronics are rated to work at ambient temperatures of 70 C (about 160 F). It's not that simple in reality, as surrounding electronics play a role in heating up components, but that's a good first way to think about it. I know that the internal air temperatures are higher, but it seems okay to me.

Like Mike said, though, a fan would work great to reduce the air temperatures around the unit.

My Pioneer feels quite a bit warmer than that to me, but I haven't measured the temperature.

For longevity 60 Celsius should be considered an absolute maximum for long term temperature.

 

[Adam]

For longevity 60 Celsius should be considered an absolute maximum for long term temperature.

Why's that? I ask out of curiousity, not out of debate.

 

[jamie2112]

I am hot, thanks very much for noticing....

 

[TLS Guy]

Why's that? I ask out of curiousity, not out of debate.

The reason lies in the life temperature curves of solid state devices. Pretty much every solid state device has this in its spec sheet. As far as temperature, the curves are log. For most devices 60 Celsius is usually the point were the steep part of the curve starts. So if you run devices below that curve you can expect modest increase in life span. However as you go above that point you can expect rapid decreases in longevity.

One word about the new more complex microprocessor chips. The higher the processing rate, the shorter the life of the chips. My son who is a solid state chip designer, says the life span of newer faster more powerful chips has dropped to around four years. Therefore there seems to be finite relationship between life and processing power developing.

It will be interesting to see how this plays out with units that decode all the new loss less codecs that have significantly more processing power than their predecessors.

For these newer units, I would say run them as cool a possible.

 

[3db]

The reason lies in the life temperature curves of solid state devices. Pretty much every solid state device has this in its spec sheet. As far as temperature, the curves are log. For most devices 60 Celsius is usually the point were the steep part of the curve starts. So if you run devices below that curve you can expect modest increase in life span. However as you go above that point you can expect rapid decreases in longevity.

One word about the new more complex microprocessor chips. The higher the processing rate, the shorter the life of the chips. My son who is a solid state chip designer, says the life span of newer faster more powerful chips has dropped to around four years. Therefore there seems to be finite relationship between life and processing power developing.

It will be interesting to see how this plays out with units that decode all the new loss less codecs that have significantly more processing power than their predecessors.

For these newer units, I would say run them as cool a possible.

Its all coming back to me like a bad fog.

If I rememeber correctly, commercailly available solid state devices spec their range from from around -25Celcius to 60 Celcius. Millitary grade go from around 50 C to 100C. TLS, one thing you forgot mention are the heat dissapation curves. If your running your semiconductor around 60 C, teh ambient air temp better be below 25C or you have a heat sink to conduct teh heat away. I think 60C is at its upper limit.

 

[TLS Guy]

Its all coming back to me like a bad fog.

If I rememeber correctly, commercailly available solid state devices spec their range from from around -25Celcius to 60 Celcius. Millitary grade go from around 50 C to 100C. TLS, one thing you forgot mention are the heat dissapation curves. If your running your semiconductor around 60 C, teh ambient air temp better be below 25C or you have a heat sink to conduct teh heat away. I think 60C is at its upper limit.

Yes that is true. 60 is really the upper limit, and better to be below. Yes, it is the temperature at the device that counts. There is no substitute for big heat sinks. Far audio fans are a problem.

This whole heat dissipation issue, is one of my big reasons for not being keen on the whole receiver concept. All things being equal, you are much more likely to get longer life from separates, which mitigates the original expense to some degree, to say nothing of improved performance driving many speakers out there.

I think I can probably claim to keep units in service longer than anyone else on these forums. I have a nice system and I avoid budget items. I would make a bet that my average yearly expense over time is among the lowest. It is hard to drive this concept home, but I believe it makes economic sense.

 

[MatthewB.]

I have the 805 (which is now in the service center because it died (local tech says I can't se this as a preamp for some reason, but that didn't make sense, so I shipped it to a regional service center under warranty) Anyway, I had a small 4" fan blowing across the top and it kept my Onkyo very cool to the touch, but you could still feel the heat on the inside. While doing research I read that it is always better with Onkyo, to buy a small fan that not only blows cool air in, but pulls hot air out. So I ordered one of those from an internet company. This not only gets circulation blowing through the receiver, but hoepfully will prolong the life of the circuits inside. It is best to make sure you have the fan on the back right side where all the video processing chips are located and which generate the most heat.

 

[Soundman]

Since I have stepped into the arena of HT and music listening on a more active level I have noticed my AVR's temp. is what I would think to be on the high side. For the record its an Onkyo TX-SR605. So I placed a temp. probe on it today while I was listening to some music, approx. two hours. When I checked the temp. it was 110.4 degrees, not smoking hot but maybe a fan of sorts would be best as we all know heat and electronics are bad. So again I ask, are you hot?

I believe you mentioned in another thread about going with a couple Emotiva products. If that is the case then heat will not be an issue for you as, from my experience, their products run quite cool.

 

[MatthewB.]

Soundman, the Onkyos still run hot, not because of the amplifier power, but the video processing chips, which run hotter than using the onboard amps. I use my 805 strictly as a preamp and it still runs very hot and I am just using video pass through via component and not using HDMI for video at all. Still runs hot though.

 

[Soundman]

Soundman, the Onkyos still run hot, not because of the amplifier power, but the video processing chips, which run hotter than using the onboard amps. I use my 805 strictly as a preamp and it still runs very hot and I am just using video pass through via component and not using HDMI for video at all. Still runs hot though.

I see, well heat is never a good thing, IMO. None of the Emotiva stuff I have used ever ran hot. That goes for their amps and their processors. I'm not trying to sell any particular brand, but, they are a good choice if heat is an issue.

 

[jayhawk069]

I didn't want to assume what Don was saying, but 110 F is about 43 C, and 43 C ambient air is not hot at all for most electronics.

That's right. Considering that it exceeds 50C in Baghdad in the summer, 43 is cool as a cucumber.