Symmetric PSUs and negative voltage regs - 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 30th July 2009, 11:11 PM   #1
diyAudio Member
 
hollowman's Avatar
 
Join Date: Jan 2007
Blog Entries: 3
Default Symmetric PSUs and negative voltage regs

You've all seen the ubiquitous symmetric PSUs: +/- voltage outputs, using a pair of LM3x7: 317 for + regulation, and 337 for negative.
Somewhere in the archives I recall a discussion on the innate limitations of negative regulators like 337s. Don't recall the specifics, but some noted that for +/- requirements, it would be better to simply use two pos. regs (e.g. 317's), but wire the downstream ckt backwards.
Pun unintended (!), what are some positives and negatives of this approach?
  Reply With Quote
Old 7th August 2009, 12:57 PM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
read Jbau's thread.
He has measured and listened to 337 compared to 317 and 1085 and declares the 317 as the worst of this lot for his testing and listening arrangement.
__________________
regards Andrew T.
  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
adjustable voltage regs compatability KevinLee Parts 1 16th December 2008 07:18 PM
Generic snubber values: fixed-/variable-voltage regs hollowman Power Supplies 44 28th April 2008 10:09 PM
Low noise voltage regs Extreme_Boky Digital Source 3 17th May 2007 05:34 AM
negative voltage doubler for ccs Jaap Tubes / Valves 6 6th February 2006 05:32 AM
Amplifier with LM317/337 voltage regs. DigitalJunkie Solid State 1 20th January 2005 11:36 AM


New To Site? Need Help?

All times are GMT. The time now is 10:15 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