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  1. #16
    Join Date
    Aug 2008
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    near Rockhampton
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    6,216

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    I would solder very thin pieces of copper together if I wanted a super cooler.

    Cooling is done by surface area. The thinner the pieces, the more of them, the more surface area the greater the cooling.
    Gold, the colour of choice for the discerning person.

  2. #17
    Join Date
    Nov 2017
    Location
    UK
    Age
    42
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    2

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    Ok the reason for "cutting" the fins into the piece of copper is to ensure the best thermal performance as any welded or "applied" parts will compromise coppers heat transfer qualities by forcing heat through solder or similar.
    As for the answers im thankful but i think people are getting too deep : ) Im trying to find a way to cut the finest channels i can into copper. Short of making some sort of level slide system and using a steel razorblade to literally cut away at the copper though, it doesnt sound like there is going to be a quick solution!
    Im now thinking if i use a X Y compound table and make a perfectly level slide for a blade, i could pass the blade over the copper and basically scratch a channel, move the table slightly and repeat. Would take a lot of time but its the only way i can think of cutting so finely into copper!

  3. #18
    Join Date
    Oct 2007
    Location
    Sydney
    Posts
    3,112

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    With all due respect I'd suggest you are both overthinking this and didn't properly read the comments about how to construct this by stacking thin stock. The function of the solder is to do nothing more than hold the stack as one solid block, the edges of the strips are still the points of contact with the heat source. The difference in thermal properties between that and machining from a solid block of copper would be so negligible I would challenge you to demonstrate any measurable difference.

    You could "scratch" away the copper as you suggest. You could also use a single hair to friction saw your way through the block. Each idea being as equally stupid, hence I'm wondering if this isn't actually a wind-up. That being the case I wish you well in your time-wasting journey.

  4. #19
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    4,255

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    Quote Originally Posted by Pete F View Post
    construct this by stacking thin stock. The function of the solder is to do nothing more than hold the stack as one solid block, the edges of the strips are still the points of contact with the heat source. The difference in thermal properties between that and machining from a solid block of copper would be so negligible I would challenge you to demonstrate any measurable difference.
    I agree!
    You would not be able to measure the performance. Calculus would be the only way and I assure you it will be negligible when considering total surface area of solder V area of cooler.

  5. #20
    Join Date
    Oct 2007
    Location
    Sydney
    Posts
    3,112

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    Indeed! The sliver of solder is between and separating the heat conducting fins, much like a layer of oxidisation ... therefore, if you're going to thermally saw your block of copper with a human hair, make sure you use OFC (Oxygen Free Copper), another area of quasi science where legitimate science is used to baffle a truck load of BS and make it sound legitimate!

  6. #21
    Join Date
    Apr 2012
    Location
    Healesville
    Posts
    2,129

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    EDM or wire cutting would be the way to go, how deep are your pockets

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