RE: [CAD_CAM_EDM_DRO] Re: What's better, extruded heatsinks or ma chines heatsinks?

i would concider a peltier junction (try allelectronics.com) its a little
device that 'pulls' heat from one of it's surfaces to another, supposed to
be the best, short of refrigeration coils... (as they are much more
efficient)---Dave L.

-----Original Message-----
From: rab@... [mailto:rab@...]
Sent: Sunday, February 17, 2002 3:00 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: What's better, extruded heatsinks or
machines heatsinks?


Some folks building high performance or overclocked computers lap
both the heatsink and CPU with progressive grades of wet and dry
paper on a sheet of plate glass, then use a tiny amount of silver
paste. ( note. don't try this at home on your CPU )
Looks like I'll be doing this to my Gecko 340s as a couple of screws
extrude slightly from the face, making a good heatsink contact
impossible.

Rab

>
> It generally makes no difference. One thing is that extruded heat
> sinks may not have a truly flat surface for the heat source to be
> clamped to. So, you might need to machine that flat. Some do
> come out very flat, but I've seen some that are way off of flat.
> Otherwise, thermal conductivity doesn't vary much either way.
> make sure you use a thermally conductive grease or silicone
> pad to transfer heat from the Gecko to the heat sink. Bolting
> two nearly flat surfaces together can provide VERY poor thermal
> transfer without something to bridge the gaps.
>
> Jon

Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/

Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
Moderator: jmelson@... timg@... [Moderator]
URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
bill,
List Manager



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/