Aleph 3 / power supply - 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 31st July 2012, 02:56 AM   #1
elecres is offline elecres  United States
diyAudio Member
 
elecres's Avatar
 
Join Date: Aug 2008
Default Aleph 3 / power supply

Newbie building a Aleph 3 . pics. attached. looking for info on the build and want to use 20k 100v caps in pic and looking for info on PS LAYOUT ,also would like to point to point [hardwire] the ps components. tnx in advance hopefully the build turns out ok!!
Attached Images
File Type: jpg IMG_7241.JPG (534.9 KB, 258 views)
File Type: jpg IMG_7242.JPG (599.8 KB, 240 views)
File Type: jpg IMG_7243.JPG (560.2 KB, 230 views)
__________________
As in life,brilliant moments are worth the price of admission !!
  Reply With Quote
Old 31st July 2012, 05:06 AM   #2
diyAudio Member
 
Join Date: Oct 2004
What kind of information are you looking for? (I built an Aleph 3 that I absolutely love).

Look at the Burning amp docs on passdiy for PS schematics that you can use.

I have 2 56k uf(50v) caps per rail and a Jantzen 2.2mH 15 AWG Air Core Inductor in between instead of the resistors. Chokes instead of resistors made a noticeable difference in the sound.

The transformer is 18+18(400VA) from antek.
__________________
-uv-
  Reply With Quote
Old 1st August 2012, 01:37 AM   #3
elecres is offline elecres  United States
diyAudio Member
 
elecres's Avatar
 
Join Date: Aug 2008
THAT KIND OF INFO, TNX ! ALSO ORDERED 4.7 UF JANZEN CAP FOR POWER SUPPLY . FOUND ALEPH3 POWER SUPPLY SCHEMATIC TODAY : ] I ALSO HAVE ANTEK 20+20 THINK 600VA
__________________
As in life,brilliant moments are worth the price of admission !!
  Reply With Quote
Old 1st August 2012, 01:39 AM   #4
elecres is offline elecres  United States
diyAudio Member
 
elecres's Avatar
 
Join Date: Aug 2008
NO IT IS A 400VA ALSO
__________________
As in life,brilliant moments are worth the price of admission !!
  Reply With Quote
Old 2nd August 2012, 03:08 PM   #5
diyAudio Member
 
Join Date: Dec 2008
Think you are right to keep the electrolytics as far away from the heat sinks as possible.

You could cut a square piece of FR-4 or aluminum - drill 4 holes near the corners
and then connect the 4 terminals of the electrolytics to it.
This would be your ground reference node.
If you use FR-4, it will need to be sprayed with a mask to stop oxidizing.

You may want to consider insulating the tops of those electrolytics.

Will your case have ventilation from the bottom and the top ?

I see you are using a soft start - good.


I'm wondering - How important is it to keep the diodes bridges away from the amp circuitry ?
.

Last edited by Uunderhill; 2nd August 2012 at 03:11 PM.
  Reply With Quote
Old 2nd August 2012, 03:15 PM   #6
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by Uunderhill View Post
I'm wondering - How important is it to keep the diodes bridges away from the amp circuitry ?
.
You want to keep the loops formed by the transformer - diodes - first large cap tight/short since current flow there is large and transient as it only flows when the voltage across the transformer secondary is higher than what is stored across the capacitance (plus the diode drop)
  Reply With Quote
Old 2nd August 2012, 05:57 PM   #7
diyAudio Member
 
Join Date: Dec 2008
Quote:
Originally Posted by Tazzz View Post
You want to keep the loops formed by the transformer - diodes - first large cap tight/short since current flow there is large and transient as it only flows when the voltage across the transformer secondary is higher than what is stored across the capacitance (plus the diode drop)
Thanks for the advise - I'll try to keep the secondary - diode - first cap loops short.
.
  Reply With Quote
Old 3rd August 2012, 02:44 AM   #8
elecres is offline elecres  United States
diyAudio Member
 
elecres's Avatar
 
Join Date: Aug 2008
yes , I planned on using copper squares for caps and yes will have ventilation top and bottom!Hopefully it all works out well , if it does I want to add volume pot and make it a intergrated.
__________________
As in life,brilliant moments are worth the price of admission !!
  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
Aleph 2 power supply MikeZ Pass Labs 50 9th November 2012 02:40 PM
Aleph X power supply Mach_Y Pass Labs 42 29th March 2004 09:43 PM
Aleph-4 Power Supply needs help ruangrit Pass Labs 1 25th January 2004 06:38 AM
Aleph 5 Power Supply martinschki Pass Labs 66 25th January 2003 07:34 AM
Aleph 5 power supply. Tony D. Pass Labs 11 30th September 2002 10:08 PM


New To Site? Need Help?

All times are GMT. The time now is 01:28 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