Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Building a symmetrical psu B1 buffer
Building a symmetrical psu B1 buffer
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 14th June 2009, 01:54 PM   #11
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Building a symmetrical psu B1 buffer
Positive reg.
Attached Images
File Type: gif plus10v.gif (6.6 KB, 16479 views)
  Reply With Quote
Old 14th June 2009, 01:57 PM   #12
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Building a symmetrical psu B1 buffer
Negative reg.
Attached Images
File Type: gif neg10v.gif (6.8 KB, 15914 views)
  Reply With Quote
Old 14th June 2009, 01:59 PM   #13
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Building a symmetrical psu B1 buffer
The works.

Click the image to open in full size.
  Reply With Quote
Old 14th June 2009, 02:05 PM   #14
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Building a symmetrical psu B1 buffer
Layout. (Details and copper side etc. tomorrow).
Attached Images
File Type: gif pcbup.gif (31.1 KB, 15062 views)
  Reply With Quote
Old 14th June 2009, 02:19 PM   #15
jean-paul is offline jean-paul  Netherlands
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
Hi Salas and Crt. The symmetrical B1 becomes mature. How about the need for heatsinks on the transistors ?
__________________
It's only audio. Member of the non modular PCB design committee
  Reply With Quote
Old 14th June 2009, 02:37 PM   #16
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Building a symmetrical psu B1 buffer
I have calculated that with 60mA CCS per rail (68R//68R=R1) there is no danger at 10V. 60-17mA per rail times 10V for each shunt element = 430mW each. +/- 17mA runs in the audio circuits. No problem for T0-240 devices like those used.

Crt uses 3X68R in parallel, so about 100mA CCS with his 1.87V Leds, at about 11V (1.87Vf gets him a bit high here too). About 1W then.

Nothing burned (50C), but being cautious, he added those:

Click the image to open in full size.

Just use R1=34R, and no worries.
  Reply With Quote
Old 14th June 2009, 05:37 PM   #17
crt is offline crt  Indonesia
diyAudio Member
 
crt's Avatar
 
Join Date: Apr 2007
YES SALAS !!! this one is SUPERB.
and has already kicked my previous symetric b-1 buffer.
  Reply With Quote
Old 14th June 2009, 06:38 PM   #18
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Building a symmetrical psu B1 buffer
I am happy that you like it. Enjoy.
  Reply With Quote
Old 14th June 2009, 08:55 PM   #19
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Building a symmetrical psu B1 buffer
slightly oftopic

Is it possible to use just pos shunt reg with original "singleend" B1

ehhh, probably not

__________________
sometimes we know very little, and sometimes we know too much
  Reply With Quote
Old 14th June 2009, 09:12 PM   #20
jean-paul is offline jean-paul  Netherlands
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
It is quite comical to see that ( after separating the"symmetrical" thread from the normal B1 thread ) questions about the normal version arise in this thread

It should work but it should be made for the right voltage of standard B1. AFAIK this was discussed in another thread:

http://www.diyaudio.com/forums/showt...hreadid=143693

I just found out that the Search function really works effectively nowadays ! A change for the better.
__________________
It's only audio. Member of the non modular PCB design committee
  Reply With Quote

Reply


Building a symmetrical psu B1 bufferHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
New-building of my B1 buffer Babowana Pass Labs 328 20th February 2010 02:14 AM


New To Site? Need Help?

All times are GMT. The time now is 06:18 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki