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Old 16th June 2011, 08:42 PM   #1821
Pato666 is offline Pato666  Argentina
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Quote:
Originally Posted by regiregi22 View Post
There are always leftovers and spare parts, but you NEVER have spare transformers, big caps or heatsinks at least in my case.
ha ha ha, that's true!!! my case too
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Old 17th June 2011, 02:57 AM   #1822
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I have 5 transformers sitting in the corner
(not small ones either, big hefty 700va ones)
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Old 17th June 2011, 01:20 PM   #1823
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Default integrated GC lm3886 with OP2134

this is another GC..
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Old 17th June 2011, 02:42 PM   #1824
mjf is offline mjf  Austria
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lm1875........testing the "cheap amp" . playing music. it works.
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Old 17th June 2011, 03:58 PM   #1825
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LM3886- 6 CHANEL
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Old 17th June 2011, 05:00 PM   #1826
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Quote:
Originally Posted by danzrose View Post
this is another GC..

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A heat sink is only a sink until it reaches the temperature of the heat source. It needs to exchange that heat with cooler air to continue functioning as a heat sink.

You will be better getting rid of those heat sinks and just bolting the chips directly to the chassis walls (assuming the walls are > 4 mm aluminium). This gives a chance for the heat to get out of the box and not cook your capacitor bank.

Even venting the chassis will not help, as the heat sinks are installed horizontally instead of vertically, thereby preventing natural convection.

Last edited by discrete; 17th June 2011 at 05:04 PM.
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Old 17th June 2011, 06:29 PM   #1827
udailey is offline udailey  United States
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Quote:
Originally Posted by discrete View Post

You will be better getting rid of those heat sinks and just bolting the chips directly to the chassis walls (assuming the walls are > 4 mm aluminium). This gives a chance for the heat to get out of the box and not cook your capacitor bank.

Even venting the chassis will not help, as the heat sinks are installed horizontally instead of vertically, thereby preventing natural convection.
Agreed. Bolt to the side or put the sinks on the outside and drill some holes to mount chips on the sink. Even just mounted on the outside with no holes would help more.
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Old 17th June 2011, 09:46 PM   #1828
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speaking of ventillation, is there any at the bottom? top is great, when you add it; but a lot of people don't add any on the bottom. air comes in from the bottom if you allow it..
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Old 18th June 2011, 02:04 PM   #1829
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A couple of holes on the bottom in the back and a couple in the front on the top will give convection through this horizontal sinks and back to front cooling to keep the equipment rack cool.
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Old 18th June 2011, 04:38 PM   #1830
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formulate_post("yo dawg", "heatsink on a heatsink");

(sorry)
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