TIP29 in my Bride of Zen - 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 7th June 2004, 02:10 AM   #1
diyAudio Member
 
Join Date: Nov 2002
Location: montreal
Default TIP29 in my Bride of Zen

Hello, I just want to talk about something in my Bride of Zen amplifier power supply.
At the output of my 30-30v transformer, I have 95Vdc, so, at the output of the regulator, I have 60v. My TIP29 have to burn 35V!
After a couple of minutes, My TIP29 is very very hot, It is imposible to touch it, it is to hot. I have a little heat sink on it, like the one on my mosfet....

I see two solution:

1- Use a bigger heat sink.
I don't want to do that because it will be physically difficult

2-Put a power resistor between the 95v and the Collector of the transistor.
To that, I need to have the current draw of the preamp, I'm not sure about this, maybe 100mA ?
If that, the resistor will be 35/0.1=350 ohm ???

Thank you !
  Reply With Quote
Old 7th June 2004, 03:24 AM   #2
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
Another solution could be reducing the bias from about 40mA to about 30mA, by adjusting R108i.e. V across R108/R108 = 30mA. I have tried with 30mA with a still good sound.
  Reply With Quote
Old 7th June 2004, 08:05 AM   #3
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
Further to post#2...

The reduction of the bias could be possible simply by adjusting P102 till the voltage across R108 reaches about 3V. If so, this method does not require any addition, deletion or change of component.

Good luck.
  Reply With Quote
Old 7th June 2004, 03:48 PM   #4
Henrik is offline Henrik  Denmark
diyAudio Member
 
Join Date: Feb 2002
Location: Copenhagen Denmark
arnold19

Take a look at this post and the discussion around.

http://www.diyaudio.com/forums/showt...804#post285804

Regards
__________________
Henrik
  Reply With Quote
Old 7th June 2004, 03:55 PM   #5
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Default Re: TIP29 in my Bride of Zen

Quote:
Originally posted by arold19
Hello, I just want to talk about something in my Bride of Zen amplifier power supply.
At the output of my 30-30v transformer, I have 95Vdc, so, at the output of the regulator, I have 60v. My TIP29 have to burn 35V!
After a couple of minutes, My TIP29 is very very hot, It is imposible to touch it, it is to hot. I have a little heat sink on it, like the one on my mosfet....

I see two solution:

1- Use a bigger heat sink.
I don't want to do that because it will be physically difficult

2-Put a power resistor between the 95v and the Collector of the transistor.
To that, I need to have the current draw of the preamp, I'm not sure about this, maybe 100mA ?
If that, the resistor will be 35/0.1=350 ohm ???

Thank you !


If you have 95VDC from your 30-30V transformer, I suggest that is the real problem. (I assume you rectify the two 30V secs in series with a bridge). Maybe you should get another transformer, for the pre-amp this would not be too expensive?

Jan Didden
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W. S. Maugham
Check out Linear Audio!
  Reply With Quote
Old 8th June 2004, 07:11 PM   #6
Anorgan is offline Anorgan  Croatia
diyAudio Member
 
Anorgan's Avatar
 
Join Date: Jul 2003
Location: Croatia
This are my heatsinks. Tip doesn't get hot - it's warm. That 5W resistor gets hot
So see for yourself if you have a smaller heatsink or something is wrong with yours (i remember you had some trouble with it).
Attached Images
File Type: jpg boz_2.jpg (78.3 KB, 244 views)
  Reply With Quote
Old 18th June 2004, 11:11 PM   #7
diyAudio Member
 
Join Date: Nov 2002
Location: montreal
Default picture

Here the picture of my preamp. He can see the little heat sink on my tip29 in the bottom at the right of the pic...
Attached Images
File Type: jpg preamp3petit.jpg (44.7 KB, 158 views)
  Reply With Quote
Old 18th June 2004, 11:14 PM   #8
diyAudio Member
 
Join Date: Nov 2002
Location: montreal
Default more picture

Here more picture of my preamp!
Attached Images
File Type: jpg preamp2petit.jpg (36.4 KB, 143 views)
  Reply With Quote
Old 18th June 2004, 11:16 PM   #9
diyAudio Member
 
Join Date: Nov 2002
Location: montreal
one more
Attached Images
File Type: jpg preamp1petit.jpg (70.1 KB, 154 views)
  Reply With Quote
Old 18th June 2004, 11:17 PM   #10
diyAudio Member
 
Join Date: Nov 2002
Location: montreal
the last
Attached Images
File Type: jpg preamp4petit.jpg (53.7 KB, 136 views)
  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
Bride of Zen, Bride of Son of Zen 2Bak Pass Labs 12 18th September 2013 06:54 PM
complementary pairs tip29 tip30 Acoustat Solid State 3 4th April 2009 09:33 PM
BOZ builders - Here's a source for TIP29 KT Pass Labs 4 30th November 2005 06:15 PM
BOZ: Replacement for tip29? KT Pass Labs 22 25th December 2004 11:51 PM
Bride of Son of Zen vs. A;eph P Peter Daniel Pass Labs 0 25th January 2002 08:45 PM


New To Site? Need Help?

All times are GMT. The time now is 10:24 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