What the Finns are made of
The fins are also (unfortunately) coated in black, and the powder increases the heat transfer resistance to the air. Let’s first look at the 300x magnification of the EA-300, which already shows us the particles of the coating in the right light. I don’t need to make this any bigger, because we already know the coating from the previous page, which was about the heatpipes.
Here, too, I had to struggle de facto through the coating (and even an air pocket), but finally, by the 15th shot, you can already see the end of the outer pellet.
Hooray! It’s (almost) pure aluminum, no special alloy. Which I can also stop the search at this point, nothing will change there. By the way, the enclosed heat sinks are made of aluminum and copper, in the prototype it was still all pure copper. In this case, however, it hardly makes a difference in terms of cooling, only in terms of price.
Summary and conclusion
In the end, I could only prove what was already known, because it is written in the datasheet. But you never know… By the way, this is exactly where you are asked now, because you can actually measure pretty much everything, as long as it fits underneath and is not organic. So if you have an idea and maybe even the right test sample, feel free to contact me (mail or PN in the forum). There are no limits to the imagination, but we already had that. And you can think of enough to test unusual things or even nonsense. So please stay curious!
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