On Dec 22, 2003, at 10:42 PM, Mikael Bystr=F6m wrote: > I need suggestions on what material and thickness the cooling=20 metalplate that is supposed to be on top of the 500 mhz G3 Powerlogiz Blue chip=20= for the Powerbook Wallstreet model ( I have a rev. 2), should be. I just bought one second hand and it seems to be missing from the package and=20= I have to make my own.< On Tue, 23 Dec 2003 14:50:26, Paul Nicholson wrote:
> > Make it out of aluminum. You want a material with a low thermal=20 resistance. (snip) Copper has an even better thermal=20= conductivity, but is both heavier and more expensive. << Make it out of Copper, which is twice as thermally conductive as aluminum, unless the shop tools or a dollar makes the difference. If money really doesn't matter, make it out of Silver, which is slightly better. :-) Potential oxide problems could be worth considering. Use a thermally conductive protection on the interface. Aluminum would be the normal choice for mass production extrusions, critical weight and pinch penny cost considerations. Your time and trouble should govern this decision. Don __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree -- G-Books is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Check our web site for refurbished PowerBooks | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-Books list info: <http://lowendmac.com/lists/g-books.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-books%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
