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Old 2nd June 2011, 03:11 PM   #11
Join Date: Dec 2007
Small curvature on sinks without heat spreaders would not matter much
But you could ceck with a straigt edge (like stanley knife blade) shine same light on the back of it and have a look.

To cek the whole sink you need some sort of realy flat surface Glass /Granite and a bit of oily ink rub the sink on the surface and the ink shows the hi spots.
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Old 3rd June 2011, 04:22 AM   #12
Join Date: Oct 2005
Location: Central Florida
The whole heatsink doesn't need to be perfectly flat, just where the fet sits. A good mill file will get you there with no trouble, just keep it clean while you are working it. Then you can polish it to perfection if you would like.

Best, Bill
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Old 3rd June 2011, 04:27 AM   #13
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Join Date: Mar 2003
Location: midwest
Originally Posted by Dmatuszak View Post
Where did you get those kerafols?
member zhoufang right here on DIYaudio!

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