Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Heatsink Preparation
Heatsink Preparation
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 5th May 2005, 10:42 AM   #1
dhole is offline dhole  United Kingdom
diyAudio Member
dhole's Avatar
Join Date: Jul 2004
Location: Brighton
Default Heatsink Preparation

Hi There people

Still got the mumps..... but It keeps me behind the soldering iron.
So Ive got one channel of aleph 5 nearly ready. Its time to prepare the heatsinks for use.

The sinks are used (pulled out of a radio transmitter. There were devices attached but not quite in the right places. I will need to drill some holes and prepare the surfaces. The surface is quite smooth as I say they have had stuff mounted before. What sort of steps shuld I take to prepare the best finish ?
The sinks are aluminium (or aluminum?! I cant spell but Im not disleksik) I presume there is some sort of buffing compound and a special buffer material made from behind ear hair of female shrew. Could anyone advise please.
  Reply With Quote
Old 5th May 2005, 11:43 AM   #2
dhole is offline dhole  United Kingdom
diyAudio Member
dhole's Avatar
Join Date: Jul 2004
Location: Brighton
1200 wet dry..... wet I'll give that a go one the sink.... any other suggestions
  Reply With Quote
Old 5th May 2005, 11:57 AM   #3
mwmkravchenko is offline mwmkravchenko  Canada
Mark Kravchenko
diyAudio Member
mwmkravchenko's Avatar
Join Date: Jan 2002
Location: Perth Canada
Heatsink Preparation
Default Sorry about the Mumps!

THe basic idea is that the better the contact patch between the heatsink and the device that warms up the better the cooling capability. So keeping that in mind I would give it a good sanding backed by a block of something that will give youa good flat surface. To start off with 1200 grit would be rather fun. More like a government makework project. Term to last 2 years to indefinite. No siree. I'd start out at 220 ( wet and dry paper ) and flaten with a bit of soapy water as a lubricant. If you want to go to 400 and up go for it. But you are really only cutting down the bumps made by drilling the new holes not getting it ready for a paint job!

  Reply With Quote
Old 5th May 2005, 09:47 PM   #4
AndrewT is offline AndrewT  Scotland
Join Date: Jul 2004
Location: Scottish Borders
ensure all the little craters surrounding inevitable dings are removed.
Countersink all your tapped holes.
These steps are to ensure that the transistors are tight up against the heatsink and not sitting on top of all those mountain sized ripples, burrs, swarf etc.
You could try gluing the wet or dry to a flat surface (glass?) & then rubbing the heatsink on that. If you are really adventurous (no other life) try flatting the semis as well.
regards Andrew T.
  Reply With Quote
Old 6th May 2005, 11:41 AM   #5
Alain Dupont is offline Alain Dupont  France
diyAudio Member
Alain Dupont's Avatar
Join Date: Sep 2003
Location: Eysines - France

To get a good surface on the heatsinks of the A75
--> I have used a diamond stone 2.1/2" * 6" fine grain ; just after countersinking all the tapered holes. It does a very good job before
using the thermal paste or pads...


  Reply With Quote


Heatsink PreparationHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Stator material selection, preparation and contacts bshaw147 Planars & Exotics 39 17th June 2009 06:47 AM
Heatsink... Lewis Moon Chip Amps 8 26th November 2008 07:22 PM
diy heatsink JCM Pass Labs 3 27th March 2006 04:52 AM
pc cpu heatsink to use with GC sss Chip Amps 29 7th March 2004 08:11 AM

New To Site? Need Help?

All times are GMT. The time now is 08:31 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio