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  #21 (permalink)  
Old 4th October, 2001, 03:47 PM
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Or could the green stuff be from a contaminant residue left on the copper from the shop where they we machined?
Just checked: most copper salts are either blue or green or somewhere in between, except for oxides of copper which are red or black or somewhere in between.

There's a certain amount of chlorine floating around in the atmosphere anyway, so it could capture it from there - the Statue of Liberty (big, French and made of copper) went green long before acu's were invented Just curious that it captured so much so quickly...
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  #22 (permalink)  
Old 4th October, 2001, 07:35 PM
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i know that the bigger the temp diff between air and the heatsink the better! dimmreaper as the the whack em in with a hammer approach... id still prefer a shrink fit, im sure i could do it no prob, justas cusil isnt the hardest substance in the world as i understand it... whalloping copper pins into it could distort the base..... i dont really want that.

i THINK cusil is used as bearings in some aero engines.... anyone know much about its properties other than how well it conducts heat.... if it is a good bearing material im almost positive i can get my hands on some for almost nothing!
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  #23 (permalink)  
Old 6th October, 2001, 04:32 PM
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It's amazing that none of us has ever made a heatsink from scratch. Home made waterblocks, ducts, case mods, and out of all that combined effort, I can't belive that no one has ever thought to make a heatsink.
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  #24 (permalink)  
Old 6th October, 2001, 04:37 PM
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Quote:
Originally posted by CrystalMethod
It's amazing that none of us has ever made a heatsink from scratch.
I have . . . .
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  #25 (permalink)  
Old 6th October, 2001, 06:46 PM
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jeff, how well did the heatsink work?
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  #26 (permalink)  
Old 6th October, 2001, 11:00 PM
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Quote:
Originally posted by Random Nonsense
jeff, how well did the heatsink work?
Pretty good back in the day when I made it, it kept a K6-3 400 cool anyway. Ever see the Zalman Flower heatsinks??? I did the same thing, only I recycled beer cans! I ended up accidently stepping on it, got a huge cut in my foot from it. It was pretty mangled after the accident so I just threw it out.
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  #27 (permalink)  
Old 7th October, 2001, 12:02 AM
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how much better is this stuff from Copper?
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Old 7th October, 2001, 12:34 AM
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Quote:
Originally posted by phiber
how much better is this stuff from Copper?
Probabally not much considering silver is only slightly better than copper to start with and an alloy would probabally be almost identicle to copper, unless it's one of those cases where the alloy actually has better properties than either of the elements.
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  #29 (permalink)  
Old 7th October, 2001, 12:39 AM
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Quote:
Originally posted by Phil


Probabally not much considering silver is only slightly better than copper to start with and an alloy would probabally be almost identicle to copper, unless it's one of those cases where the alloy actually has better properties than either of the elements.
thats what i thought
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  #30 (permalink)  
Old 7th October, 2001, 03:20 AM
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Quote:
Originally posted by Phil
unless it's one of those cases where the alloy actually has better properties than either of the elements.
Just happens to be one of those cases Pip. CuSil has about the same advantage over Silver than Silver has over Copper . . . .
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  #31 (permalink)  
Old 7th October, 2001, 11:04 AM
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I heard Cusil was about 1.5 times as good as copper..... so the price ALMOST justifies it.... anyone got any idea where i could get my hands on a bigger plate? college didnt have any old bearings i could melt down
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Old 7th October, 2001, 04:35 PM
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Quote:
Originally posted by dimmreaper
Just happens to be one of those cases Pip. CuSil has about the same advantage over Silver than Silver has over Copper . . . .
Well I never, what is the thermal conductivity of CuSil or has it not been worked out by anyone yet?
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  #33 (permalink)  
Old 7th October, 2001, 04:42 PM
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Quote:
Originally posted by Phil


Well I never, what is the thermal conductivity of CuSil or has it not been worked out by anyone yet?
Units=W/mK

Aluminum: 220
Copper: 388
Silver: 418
Silver/Copper (Cusil) Alloy: 515

Looks like CuSil is a bit better than I thought.
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  #34 (permalink)  
Old 7th October, 2001, 05:00 PM
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yep thats what i though mwuhahahaha now i GOTTA somehow get me some....
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  #35 (permalink)  
Old 7th October, 2001, 05:05 PM
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Quote:
Originally posted by Random Nonsense
yep thats what i though mwuhahahaha now i GOTTA somehow get me some....
If your looking for some, why not check in to its application in electrical contacts. It is primarily used for things like daughter board contacts, and such, because it is an awsome electical conductor.
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  #36 (permalink)  
Old 7th October, 2001, 05:14 PM
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I take it it's a better electrical condictor as well then?
And is silver heavier or lighter than copper?
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  #37 (permalink)  
Old 19th October, 2001, 06:27 AM
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Well- i took a 3/8inch copper plate- used artic silver epoxy took copper rivvits- 1inch tall--- and secured them to the plate- and use it as a chipset cooler- i have 4 of these baby- no fan needed

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