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10th February 2011, 04:36 PM
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#1 |
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diyAudio Member
Join Date: Sep 2009
Location: Blanes - Costa Brava
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Heatsinks class A amp question
Wich heatsinks need an amp in class A with a total heat disipation of 520W with a total bias 11A giving 120W RMS at 8 ohms load?
Schematics:  
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10th February 2011, 04:53 PM
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#2 |
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The one and only
Join Date: Mar 2001
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520 watts says it all. You want about 25 deg C rise above
ambient, and that means 25/520 = .047 deg / watt heat sink rating. 
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10th February 2011, 05:03 PM
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#3 |
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diyAudio Member
Join Date: Jul 2005
Location: North East
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Lets not be confused. That was .047! Not .47! 10X the sink capability of .47
__________________
“Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” Dr. Seuss |
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10th February 2011, 05:03 PM
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#4 |
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diyAudio Member
Join Date: Sep 2009
Location: Blanes - Costa Brava
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Thank you Nelson
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10th February 2011, 05:07 PM
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#5 |
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Banned
Join Date: Nov 2006
Location: Torpoint
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Why have you started another thread on the same subject ??
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10th February 2011, 05:09 PM
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#6 | |
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diyAudio Member
Join Date: Sep 2009
Location: Blanes - Costa Brava
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Quote:
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10th February 2011, 05:14 PM
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#7 |
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diyAudio Member
Join Date: Sep 2009
Location: Blanes - Costa Brava
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It's ok the schematic? because BobEllis answered me in the Solid State forum:
Heatsinks class A amp question |
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10th February 2011, 07:30 PM
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#8 | |
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Formerly Thanh1973
Join Date: Nov 2006
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Quote:
Or build monoblocks.
__________________
"No, this sucker's electrical, but I need a nuclear reaction to generate the 1.21 gigawatts of electricity I need." |
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10th February 2011, 08:39 PM
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#10 |
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Formerly Thanh1973
Join Date: Nov 2006
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If you are seriously considering building this thing you could do it with 4 x conrad mf35-151.5 per channel. So 8 total, but it will still be quite hot. If you want a cool running amp make it 6 per channel.
And don't think about stacking the heatsinks on top of each other because you lose efficiency. Probably a cube shape heatsinks on all 4 sides
__________________
"No, this sucker's electrical, but I need a nuclear reaction to generate the 1.21 gigawatts of electricity I need." |
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