Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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
Reply
 
Thread Tools Search this Thread
Old 27th February 2012, 08:45 PM   #1
diyAudio Member
 
Join Date: Aug 2007
Send a message via AIM to SL10User Send a message via MSN to SL10User Send a message via Yahoo to SL10User
Default Need help - heatsink on S/500 damaged

Hi everybody,

today I damaged one of the heatsinks. Had an accident on the stairs and one heatsink fin is heavily bent (besides a damaged stair...).



Tried to correct it by means of a huge pliers.
- No Chance, I suppose the metal will break if I use greater force.

Any ideas where I can get a new heatsink, or maybe somebody has a spare for me?



Cheers,
Gerhard
  Reply With Quote
Old 28th February 2012, 12:33 AM   #2
Eric is offline Eric  United States
diyAudio Member
 
Eric's Avatar
 
Join Date: Nov 2000
Location: Central PA, USA
I am not familiar with the S/500 configuration. Does one fin make that much difference? Is the bent fin just an aesthetic issue, or does it kill the cooling capacity of the sink because of blocked air flow? I'm inclined to say leave it alone. Otherwise, unbend it and it if breaks, file the edge so its not sharp and color it with a Sharpie.
__________________
My DIY Basement Theater, Aleph-X Amplifers and Avro Open Baffle Speaker construction pages.
  Reply With Quote
Old 28th February 2012, 01:54 AM   #3
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Silicon Valley
You take a chance by trying to bend it back again, as it may break off. Pics?

Did you check inside for damage or shifting of transformer mounts?
  Reply With Quote
Old 28th February 2012, 03:47 PM   #4
diyAudio Member
 
KatieandDad's Avatar
 
Join Date: Nov 2011
Location: UK
Its unlikely to break if you just bend it back.

Unless it is made of really crap ally. If it bent one way once it should be OK to bend it back. Keep on doing the bending and of course it will break.

You could always warm it up before tring to bend it back. I'm not talking about welding torch heat but just a hot air gun.
  Reply With Quote
Old 28th February 2012, 04:49 PM   #5
diyAudio Member
 
Join Date: Aug 2007
Send a message via AIM to SL10User Send a message via MSN to SL10User Send a message via Yahoo to SL10User
Thanks for the replies.

Of course it's only an aestethic issue, but it hurts my heart. So it's a health-issue, too.



I'll try to warm it up and bend again.

No one out there with a spare?
Attached Images
File Type: jpg P1010012.JPG (297.1 KB, 97 views)
  Reply With Quote
Old 28th February 2012, 05:00 PM   #6
Gyuri is offline Gyuri  Hungary
diyAudio Member
 
Gyuri's Avatar
 
Join Date: Nov 2003
Location: Budapest
Not a terrible disaster.
If we disregard the damage was on your soul.
In my opinion, you can straighten it without breaking it.
__________________
Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat
  Reply With Quote
Old 28th February 2012, 05:10 PM   #7
Eric is offline Eric  United States
diyAudio Member
 
Eric's Avatar
 
Join Date: Nov 2000
Location: Central PA, USA
That doesn't look at as bad as I was thinking. A little heat (heat gun, hair dryer, etc) and some gentle use of plies and cloth should be able to fix that without scratching it.
__________________
My DIY Basement Theater, Aleph-X Amplifers and Avro Open Baffle Speaker construction pages.
  Reply With Quote
Old 28th February 2012, 07:34 PM   #8
diyAudio Member
 
Join Date: Sep 2006
Location: Santa Rosa Beach, FL
THe heatsink was made from an extrusion aluminum alloy. That means it was shaped using heat and pressure. As such, heat and pressure also can be used to reform it.

If it's easy to remove the heatsink, I'd do it. (Even if it's not easy, I'd do it anyway.) You can then preheat the sink with a gas torch (propane would work). You don't want to get it hot enough to ablate the finish (anodize). Then, with a pair of vice grips (or an adjustable wrench fitting the thickness of the fin, carefully bend the fin back into shape. If you get the temp correct, it should not require much muscle-power to reform it. You may not get it perfect, but hey........

Trust me. It can be done. I've done it several times. Just be careful, and work slowly.

I would not try this, if you cannot remove the heatsink from the electronics....!!!
  Reply With Quote
Old 28th February 2012, 07:36 PM   #9
diyAudio Member
 
Join Date: Sep 2006
Location: Santa Rosa Beach, FL
(I just read Eric's post, directly above mine..... You might want to try a professional-grade heat gun as your first try. Using a propane torch requires some finesse in using it--so I'd only try a torch if the heat gun doesn't do it)
  Reply With Quote
Old 28th February 2012, 07:58 PM   #10
diyAudio Member
 
Join Date: Sep 2009
Default bending back and turnign upside/down

Hi,

good tips on bending it back already..

I am not familiar with the 500 construction, but I suppose you could undo the electronics on the heatsink, try to bend it back, and turn the heatsink upside /down to "hide" the corrected fin.

Cheers,

Max

Last edited by coolnose; 28th February 2012 at 08:00 PM. Reason: typo typo again and again..
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Celestion MD-500 and MF-500 peterdav Multi-Way 1 9th December 2010 09:29 AM
Tweeter damaged? Or worse, crossover damaged? Someone7272 Multi-Way 7 31st May 2010 08:44 PM
I need Crown XS-500 service manual or schematic (XS-500, -700, -900, -1200) timbert Solid State 0 30th March 2009 06:52 PM
Is this seriously damaged? ethrandil Parts 2 11th November 2007 05:22 PM
FS: JL 500/1 ($500 CAD located in GVA) Dynamix Lude Swap Meet 0 27th October 2004 03:21 AM


New To Site? Need Help?

All times are GMT. The time now is 01:06 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2