Welborne Labs PS1 - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 16th February 2015, 03:03 PM   #1
diyAudio Member
 
Join Date: Feb 2004
Location: Mt. Pleasant SC
Default Welborne Labs PS1

Hoping so one can help me figure out how to properly connect a toroid transformer to this dual rail power supply. The transformer is an Avel Lindbergh. I live in th US and thought I should connect the primaries and secondaries in parallel. However when I connect everything I get the proper voltages but the transformer gets hot. I would appreciate any help or guidance.

Thx

Mike
  Reply With Quote
Old 18th February 2015, 03:11 AM   #2
agdr is offline agdr  United States
diyAudio Member
 
agdr's Avatar
 
Join Date: Sep 2010
Quote:
Originally Posted by kestrel200 View Post
Hoping so one can help me figure out how to properly connect a toroid transformer to this dual rail power supply. The transformer is an Avel Lindbergh. I live in th US and thought I should connect the primaries and secondaries in parallel. However when I connect everything I get the proper voltages but the transformer gets hot. I would appreciate any help or guidance.
Hi, what is the exact model number of the transformer?

From the Welborne writeup here

http://welbornelabs.com/cat/ps1%20manual.pdf (opens PDF)

the secondaries don't go in parallel. They have to be isolated secondaires (two secondaries on the same transformer but not connected to each other). The secondaries connect up as in the schematic on page 2 there. The pair of wires from one secondary goes to the two "AC in" holes on the top left edge of the board as he shows on page 1, then the pair from the other isolated secondary connects to the other two "AC in" holes on the bottom left.

Since you need 120V in, if your particular transformer is the 120Vac/240Vac primary variety, the primary turns may very well need to be hooked up in parallel as he shows in the schematic on page 2. But the phasing matters here (which end of primary 1 connects to which end of primary 2). There should be dots somewhere or the datasheet will show phasing.

Please post that transformer model number. The transformer datasheet will list the wire colors and should show phasing.

Last edited by agdr; 18th February 2015 at 03:22 AM.
  Reply With Quote
Old 28th February 2015, 01:17 AM   #3
diyAudio Member
 
Join Date: Feb 2004
Location: Mt. Pleasant SC
Thx! It's working now.
  Reply With Quote
Old 1st March 2015, 02:50 PM   #4
agdr is offline agdr  United States
diyAudio Member
 
agdr's Avatar
 
Join Date: Sep 2010
Good to hear!
  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
Welborne Labs kingfisher Tubes / Valves 1 22nd February 2014 06:21 AM
Welborne Labs CATO PCB nautibuoy Swap Meet 0 16th February 2014 05:46 PM
What is the deal with Welborne Labs? autoformer Tubes / Valves 13 17th December 2012 06:48 PM
Welborne Labs Horrible Service sbrtoy Parts 18 19th August 2008 02:20 AM
Anyone have a Welborne Labs amp? benm Tubes / Valves 2 9th November 2006 12:33 AM


New To Site? Need Help?

All times are GMT. The time now is 07:46 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2