How hot is your BZLS ? - diyAudio
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 11th August 2003, 10:50 AM   #1
Banned
 
Join Date: Apr 2002
Location: Germany, Clausthal
Default How hot is your BZLS ?

I have measured 110C at th regulator heatsinks and 90C at the gainstage heatsinks. Als resistors and PCB is very hot! It runs for some hours until now without failure....
Attached Images
File Type: jpg image0059.jpg (44.8 KB, 644 views)
  Reply With Quote
Old 11th August 2003, 11:21 AM   #2
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
Your heat sinks look too small.
That's why I use the whole aluminum chassiss as a heat sink for all transistors.
My amp just does warm operation.

  Reply With Quote
Old 11th August 2003, 11:42 AM   #3
grataku is offline grataku  United States
diyAudio Member
 
Join Date: Dec 2000
Location: -
Default Re: How hot is your BZLS ?

Quote:
Originally posted by till
I have measured 110C at th regulator heatsinks and 90C at the gainstage heatsinks. Als resistors and PCB is very hot! It runs for some hours until now without failure....

That's nothing new.
Read my posts in one of the BLS threads about 1 1/2 years ago
  Reply With Quote
Old 11th August 2003, 12:10 PM   #4
Banned
 
Join Date: Apr 2002
Location: Germany, Clausthal
grataku, this one?
http://www.diyaudio.com/forums/showt...1820#post11820

jh6you,
The heatsinks are 13.5K/W types. There is no space for larger ones om the PCB if mounted the way the PCB is made for. They look same size like in the article. My only change is 680R instead of 750R, because 750R i did not find here. This may be responsible for a little more current.
  Reply With Quote
Old 11th August 2003, 12:44 PM   #5
grataku is offline grataku  United States
diyAudio Member
 
Join Date: Dec 2000
Location: -
There are probably even earlier posts, there I had already replaced heatsinks, I think. Anyway, 680 ohm instead of 750 will heat things up a little more not too much more.
I would start thinking about replacing the heatsinks for something bigger.

The nice thing about this site is that everything has been done and reported, the problem with this site is the search engine, it's very hard to do organize the database. If someone could come up with a way to do it he or she would make big $$$.
  Reply With Quote
Old 11th August 2003, 12:53 PM   #6
Banned
 
Join Date: Apr 2002
Location: Germany, Clausthal
you are absolutely right about the search engine. You search - find nothing. Redefine search string - find 3 pages with threads. Look into the thread - thread ist 598 posts long. Look and find nothing. Go to print view, go to show all 598 post of this thread on one page, use your browsers string search, and find something if you are lucky. But you will need a lot of time to do this with all the 3 pages of threads, so you will not find everything ....
  Reply With Quote
Old 11th August 2003, 01:44 PM   #7
UrSv is offline UrSv  Sweden
diyAudio Member
 
UrSv's Avatar
 
Join Date: Jan 2002
Location: Sweden
Quote:
Originally posted by till
you are absolutely right about the search engine. You search - find nothing. Redefine search string - find 3 pages with threads. Look into the thread - thread ist 598 posts long. Look and find nothing. Go to print view, go to show all 598 post of this thread on one page, use your browsers string search, and find something if you are lucky. But you will need a lot of time to do this with all the 3 pages of threads, so you will not find everything ....
Sorry to continue OT but you can actually display a whole thread in one page? I thought that was removed as the per_page option did not work. And what is "print view"?
__________________
UrSv
Those who say it can't be done should not stop those who are doing it.
  Reply With Quote
Old 11th August 2003, 03:03 PM   #8
Goffe is offline Goffe  Sweden
diyAudio Member
 
Join Date: Aug 2003
Location: Sweden/Thailand
This is mine version of BZLS and the aluminium sheet gets warm but not hot!

And u can touch the components for 3 sec or more without Burn u finger down !

This is my first Tread..hope it works!!!
Attached Images
File Type: jpg bzls.jpg (27.3 KB, 476 views)
  Reply With Quote
Old 11th August 2003, 03:20 PM   #9
Bricolo is offline Bricolo  France
diyAudio Member
 
Bricolo's Avatar
 
Join Date: Nov 2002
Location: Grenoble, FR
print view is the option at the page's bottom: "show printable version"

then, at the top right of the printable version, click on "show all xxx posts in one page"
  Reply With Quote
Old 11th August 2003, 04:59 PM   #10
Banned
 
Join Date: Apr 2002
Location: Germany, Clausthal
Hi Goffe,


did you try to attach a picture or link?
  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
CC-CCS-X-BZLS: It's alive! metalman Pass Labs 130 27th October 2009 03:38 AM
BZLS pre-amp garfieldcat Pass Labs 4 4th July 2005 08:38 AM
x-bzls finished! coils Pass Labs 33 16th August 2004 11:09 PM
Help needed with BZLS franck_chretien Pass Labs 2 13th February 2002 05:58 AM


New To Site? Need Help?

All times are GMT. The time now is 09:04 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