Heatsinks for Aleph 5 - diyAudio
 Heatsinks for Aleph 5
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 14th February 2004, 11:38 PM #1 diyAudio Member   Join Date: Jan 2004 Location: Hudiksvall Heatsinks for Aleph 5 I´m thinking of buildning an Aleph 5 in a couple of months. And I was thinking of buying 2 heatsinks from Conrad Heatsinks. Would one MF35-151.5 be enough for one channel? (0.21 C/W) I have seen 2 calculations: (this for 150W/channel and 23°C amb.temp.) C/W x W + amb.temp. = 0.21 x 150W + 23 = 54.5°C Or some formula at Conrad, with some correction factor K: (calculated for 30°C rise above ambient, K=1.33) 30/(1.33 x 0.21) = 107.4 W power dissipation. for 150W there would be: 40/(1.24 x 0.21) = 153.6 W power dissipation. In this case the heatsink temp. would be 40 + 23 = 63°C Someone know wich one of these is the most likely? And the transistors would be spread out over the heatsink... Thanks
 15th February 2004, 01:22 AM #2 diyAudio Member   Join Date: Feb 2002 Location: Canada Have a look at Mark Finnis' Aleph 5. He uses similar heatsinks and hopefully his experiences will be a good guide for you. Regards, Dan
 15th February 2004, 05:08 AM #3 diyAudio Member   Join Date: Jan 2004 Location: Hudiksvall Oh thanks that helped! Cheers

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