transistor placement on a heatsink - Page 3 - 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 3rd May 2003, 07:43 AM   #21
sajti is online now sajti  Hungary
diyAudio Member
 
Join Date: Apr 2003
Location: Vác, Hungary
Huh, it's note easy to explain the pictures by words

I saw Your photo, but this is absolutely different. If You put Your MOSFETs, as I explain, there should be longer distances between them.
I will scan the pictures, and I will show it.

Why they recommend that type of location? That configuration gives the most equal temperature along the heatsink

Sajti
  Reply With Quote
Old 3rd May 2003, 03:02 PM   #22
joensd is offline joensd  Germany
diyAudio Member
 
Join Date: Dec 2001
Location: Germany
Quote:
If you examine quality car audio amplifiers, their
transistor placement is not in the center, if any
thing, it's located on the the edge of the pcb,
but quality car amplifiers are pretty robust and
take major abuse, plus ambient temperatures
due to climate pre-heat the fins, in any case,
these abnormal placement of transistors don't
seem to bother these amplifiers, even kilowatt
ones
The placement of the transistors is probably due to simpler manufacturing in car amplifiers.
I always have to laugh about the heatsinks in car amplifiers anyway. 600W output and just a piece of metal around.
A buddy from mine used to service car amps the whole day.
The wooden tables they were doing the test procedures on were dark brown in those areas the amps were lying on.
I think they were far beyond from 25degress above ambient
If youŽd need the whole power from them permanently the manufactures wouldnŽt sell one fxxxing amp due to burned out cars.

Jens
  Reply With Quote
Old 3rd May 2003, 04:23 PM   #23
diyAudio Member
 
Join Date: Feb 2001
Location: Mars
I always have to laugh about the heatsinks in car amplifiers anyway. 600W output and just a piece of metal around.

Yeah, that seem to be the trend,
make a cute chassis with no fins.
Sounds like someone is trying
to save money... hehe

There are good amplifiers on the
market or even older designs that
have some heavy heatsinks with
fins that work great. All the
class D car amplifiers require
less heatsinking too.
  Reply With Quote
Old 5th May 2003, 09:25 AM   #24
sajti is online now sajti  Hungary
diyAudio Member
 
Join Date: Apr 2003
Location: Vác, Hungary
Post The pictures I promised

I hope they are no too much. The last one contains some information about the heatsink installation

Click the image to open in full size. Click the image to open in full size. Click the image to open in full size.

Sajti
  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
Mica in Heatsink TO3 power transistor or no ? aldovan Solid State 2 6th June 2008 03:39 AM
Bi-Amp / Leach / Ops Transistor Heatsink Arrangement ptah Solid State 9 11th September 2007 03:17 PM
isolating power transistor from heatsink Wagener Solid State 10 23rd May 2004 09:57 PM
Help - Mounting transistor to heatsink vsr123 Pass Labs 10 17th April 2003 11:43 AM
Vertical positioning of transistor on heatsink Eric Pass Labs 2 4th December 2002 03:14 PM


New To Site? Need Help?

All times are GMT. The time now is 09:15 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