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Old 12th February 2009, 03:28 PM   #2891
sekess is offline sekess  United States
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Thanks Pat,


Steve
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Old 12th February 2009, 06:59 PM   #2892
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Default CPU cooler

What about putting CPU coolers (fan-less or with regulated fans) - one per each transistor. Like the one attached. Such coolers with whisper quiet fans (or without) have thermal resistance around 0.15 C/W. That is effectively 100W at 40 DEG C max with room temp. 25 DEG C.

These beasts are much more effective then conventional "audiophile" heat sinks and much cheaper. Available in ANY local computer shop.
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Old 12th February 2009, 07:06 PM   #2893
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I've done that a couple times. The fans still make more noise than
I like, but I did buy a couple Zalman Reserator water coolers.

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Old 12th February 2009, 11:30 PM   #2894
labjr is offline labjr  United States
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Default Re: CPU cooler

Quote:
Originally posted by coh-b-pyky
What about putting CPU coolers (fan-less or with regulated fans) - one per each transistor. Like the one attached. Such coolers with whisper quiet fans (or without) have thermal resistance around 0.15 C/W. That is effectively 100W at 40 DEG C max with room temp. 25 DEG C.

These beasts are much more effective then conventional "audiophile" heat sinks and much cheaper. Available in ANY local computer shop.
What happens of a fan fails? You know that grinding sound when the bearings in those cheapo fans get loaded with dust. The amplifier goes up in smoke?

What we need is a lesson in making copper heat pipe heat sinks with Freon inside. The ones that look like a Miami Beach high rise condo building.
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Old 13th February 2009, 12:17 AM   #2895
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Default Re: Re: CPU cooler

Quote:
Originally posted by labjr


What happens of a fan fails? You know that grinding sound when the bearings in those cheapo fans get loaded with dust. The amplifier goes up in smoke?

......
I agree that fans are not reliable. I believe there are designs floating around for a temperature controlled cut-off switch. Would these be a prudent back up plan?
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Old 13th February 2009, 01:57 AM   #2896
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Default Conductivity of Urine

Suffice to say it wasn't my idea.....when I was a wee lad I relieved myself on the wrong barred wire fence....I only noticed the insulators after the fact.

BTW, I received (8) 22000 mfd / 35V power supply caps from Digikey today - they are smaller than C-cell batteries !! As I get older, it's like EVERYTHING is getting smaller......
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Old 13th February 2009, 03:49 AM   #2897
Aengus is offline Aengus  Canada
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Quote:
Originally posted by dcbingaman

As I get older, it's like EVERYTHING is getting smaller
But this may be a consequence of your youthful encounter with the electric fence?
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Old 13th February 2009, 10:21 AM   #2898
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Quote:
Originally posted by Aengus


But this may be a consequence of your youthful encounter with the electric fence?

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Old 13th February 2009, 01:50 PM   #2899
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Could be......but I've still got enough to keep the wife happy !!
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Old 13th February 2009, 01:54 PM   #2900
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BTW, has anyone tried one of these on a Vandersteen Quatro ? It has a very stable and high input impedance and since the amp only has to drive from ~ 100 hz up, (the woofer is active), I figured that 100 watts would be about right.
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