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

Regulated vs. Traditional
Regulated vs. Traditional
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
Thread Tools Search this Thread
Old 21st October 2004, 10:29 AM   #1
roibm is offline roibm  Romania
Join Date: Dec 2003
Location: Transylvania
Default Regulated vs. Traditional

Why should I peak one over the other?

This is a new forum, isn't it?
  Reply With Quote
Old 21st October 2004, 11:29 AM   #2
Mark25 is offline Mark25  United Kingdom
diyAudio Member
Mark25's Avatar
Join Date: Feb 2002
Location: The Netherlands (Friesland)
TNT - Solid State Power Amplifier Supply, Regulated or not?

I followed this guy's advice when building a PSU for my ESP p3a SS amp. It's head and shoulders above what ESP specify and much better than a commercial fully regulated Integrated i use.
We will pay the price, but we will not count the cost...
  Reply With Quote
Old 22nd October 2004, 10:00 PM   #3
acenovelty is offline acenovelty  United States
diyAudio Member
acenovelty's Avatar
Join Date: Aug 2004
Location: SF Bay Area
More from Dejan V. Veselinovic at http://zero-distortion.com/start.htm

  Reply With Quote
Old 23rd October 2004, 01:03 AM   #4
Circlotron is offline Circlotron  Australia
diyAudio Member
Circlotron's Avatar
Join Date: Jun 2002
Location: Melbourne, Australia
Default Best of both worlds.

I say use a fully regulated supply, but have really *big* filter capacitors at the supply output where it connects to your amp. These capacitors will be able to supply the current peaks the amplifier may draw on transients just like an unregulated supply with these same size caps, yet the whole thing will have the normal advantages of a regulated supply too.
Best-ever T/S parameter spreadsheet.
  Reply With Quote
Old 23rd October 2004, 03:15 AM   #5
jleaman is offline jleaman  Belgium
Join Date: Apr 2002
Send a message via AIM to jleaman
Regulated is best i'm building some regulated psu's for my blue amps and my gain clone's
  Reply With Quote
Old 25th October 2004, 11:40 PM   #6
cunningham is offline cunningham  United States
diyAudio Member
Join Date: Jun 2004
Location: Knoxville
Default Re: Best of both worlds.

Originally posted by Circlotron
I say use a fully regulated supply, but have really *big* filter capacitors at the supply output where it connects to your amp.
Or better yet, use multiple smaller caps in paralell, 4700uF, 6800uF.....
  Reply With Quote
Old 26th October 2004, 03:02 AM   #7
sam9 is offline sam9  United States
diyAudio Member
sam9's Avatar
Join Date: Jun 2002
Location: Left Coast
My opinions - by no means authoritative, but mine nonetheless:

For small signal applications -- preamps, signal processors, instrunentation, perhaps even for the opamp in power amps using an opam based input section -- go regulated. In each case, the principal advantage being supression of ripple and noise.

For power amps -- unregulated. More efficient, potentially more headroom from a given transformer, simpler. And since regulated supplies involve a feedback loop, avoids the possability of two feedback loops in conflict. The exception is amps with poor PSRR wich tends to include single ended designs.

I would say there are trade-off's involved: On one hand to get some desired qualities you may have to accept a design that is sensative to power supply noise which argues for a regulated supply, but if you don't feel a need for those qualities then a design with high PSRR may make a regulated supply superfluous.

Of course some people just are turned on by power supplies. As an example I'm thinking of a particularly expensive commercial headphone amp (which I'll leave nameless) I once saw the inside of. About 3/4 of the space (and it seemed like a rather large enclosure for a headphone amp) was taken up by the power supply. The amps boards themselves seemed to be little more than a single opamp with current boot, which can make an excellent headphone amp. The opamps were good units, probably OPA134s, and while a regulated supply was appropriate, the one used was way more elaborate for what was needed. The quality of construction was very good, but nontheless I failed to see the rational (as oppossed to marketing) rationale.
  Reply With Quote
Old 26th October 2004, 03:33 PM   #8
Sch3mat1c is offline Sch3mat1c  United States
diyAudio Member
Sch3mat1c's Avatar
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Or a combo: unregulated for the power amp and regulated for anything that needs stability or extreme ripple rejection: input stages and screen supplies for instance.

Seven Transistor Labs, LLC
Projects and Resources / Electronic Design and Consultation
  Reply With Quote
Old 26th October 2004, 04:06 PM   #9
markp is offline markp  United States
diyAudio Member
Join Date: Oct 2003
Location: L.A., CA
I've done both fully regulated and just the input/driver regulation and find that just doing the input/driver is 90% as good as full regulation. Full regulation is also much more costly and takes up a lot of room. Another good idea is to use two transformers on for input and one for output, that way you can use a higher voltage and regulate it down for the input/driver.
If it sounds good... it is good!
  Reply With Quote
Old 6th November 2004, 10:47 PM   #10
dutch diy is offline dutch diy  Netherlands
diyAudio Member
dutch diy's Avatar
Join Date: May 2001
Location: NL, The Hague
Send a message via ICQ to dutch diy
Default I'd prefer regulated

Hi, although I've built my J-amps with fully regulated ps both times
one thing that I've noted is that no COTS regulators are available for voltages over 35v with a decent Amp rating.

My J-amps are Class A so adding a regulated ps isn't nice for the overall efficiency but it' seemed a good idea to have. Sound wise I have not made a comparison with unregulated psu's.

I have some ideas about a setup which will be able to regulate over 70V at 5Amps but these are waiting on my next diy project.

A disadvantage of using a lot of buffer caps after the regulator is the current limitation in the regulator itself. The regulator might shutdown on the in-rush current.
  Reply With Quote


Regulated vs. TraditionalHide 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
Any traditional jazz fans out there? Bill Fitzpatrick Music 32 25th August 2008 06:15 AM
Listening axis for traditional speaker gainphile Multi-Way 6 19th May 2008 08:14 AM
Passive I/V vs. traditional I/V, FFT pics. A 8 Digital Source 49 7th June 2004 01:01 PM
Non-traditional switching supply Kilowatt Solid State 10 20th January 2002 09:06 PM

New To Site? Need Help?

All times are GMT. The time now is 09:45 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio