connecting heatsinks in series - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 12th July 2010, 10:19 PM   #1
diyAudio Member
 
Join Date: Aug 2006
Default connecting heatsinks in series

hi is there any drawbacks to connecting heatsinks in series to make a large one for output transistors?

regards

chris
  Reply With Quote
Old 12th July 2010, 10:25 PM   #2
Banned
 
Join Date: Jan 2008
Blog Entries: 2
What exactly do you mean?

How are you going to connect them 'in series'? Edge to edge? How are you going to ensure a snug fit? Short edges? Or back-to-back?

You better explain a bit more the exact physical layout you intend...

w
  Reply With Quote
Old 12th July 2010, 10:52 PM   #3
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
could you mean parallel?
If there are alternative routes for heatflow then I call that parallel.

If all the heatflow must pass, in sequence, through all the heatsinks then I define that as in series.
__________________
regards Andrew T.
  Reply With Quote
Old 13th July 2010, 07:28 AM   #4
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
using separated hetasinks for N transistors and seperated for P is guarantee of thermal run away
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 13th July 2010, 07:38 AM   #5
AKN is offline AKN  Sweden
No snake oil
diyAudio Member
 
AKN's Avatar
 
Join Date: Aug 2005
Location: In the middle of Sweden
Send a message via MSN to AKN
Hi,

Quote:
Originally Posted by sakis View Post
using separated hetasinks for N transistors and seperated for P is guarantee of thermal run away
Why? As long as there is no severe DC offset the same current pass N and P transistors. Cooling symmetry (P N) will be required though.
__________________
/ Anders
  Reply With Quote
Old 13th July 2010, 07:45 AM   #6
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
wrong even audio signal it shelf migh include pos or neg peaks of diferent magnitute that might drive the p or the n side of the amp warmer than the other ....now if the vbe multiplier is attached on the other side will not sense that and if the amp is pushed then kabooooooom
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 13th July 2010, 07:49 AM   #7
AKN is offline AKN  Sweden
No snake oil
diyAudio Member
 
AKN's Avatar
 
Join Date: Aug 2005
Location: In the middle of Sweden
Send a message via MSN to AKN
Under such circumstances I agree of course.
__________________
/ Anders
  Reply With Quote
Old 13th July 2010, 07:51 AM   #8
diyAudio Member
 
Join Date: Nov 2009
Location: Los Angeles
Quote:
Originally Posted by 4fun View Post
Hi,



Why? As long as there is no severe DC offset the same current pass N and P transistors. Cooling symmetry (P N) will be required though.
Parallel transistors must share a heatsink.

G
  Reply With Quote
Old 13th July 2010, 08:11 AM   #9
AKN is offline AKN  Sweden
No snake oil
diyAudio Member
 
AKN's Avatar
 
Join Date: Aug 2005
Location: In the middle of Sweden
Send a message via MSN to AKN
Quote:
Originally Posted by stratus46 View Post
Parallel transistors must share a heatsink.

G
Did I write otherwise?
__________________
/ Anders
  Reply With Quote
Old 13th July 2010, 08:12 AM   #10
diyAudio Member
 
Join Date: Aug 2006
yes sorry i should have been more clear, yes they would be connected edge to edge, and the pcb and output trannys would sandwich a piece of aluminium angle which would in turn run the length of both heatsinks.
  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
Wanted - 2-4 Heatsinks suitable for Pass F Series Amp Tripmaster Swap Meet 4 31st March 2010 07:17 PM
Intel CPU heatsinks as power output transistor heatsinks? deltavektor Solid State 4 29th November 2009 01:47 PM
Connecting OSCONs in series for high voltage. Fanuc Solid State 6 22nd March 2007 11:51 PM
Series connecting output Transformers. Shoog Tubes / Valves 55 12th February 2007 05:22 PM
connecting heatsinks meta Parts 1 15th July 2003 07:28 AM


New To Site? Need Help?

All times are GMT. The time now is 11:59 AM.


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