Sjöström Super Regulators

[fossil2k]

What you guys think about this voltage regulator? The schematic I got is a little crappy but that all I can get from this website below. Do you think its worth a try to build it?

http://sjostromaudio.com/joomla/index.php?option=com_content&task=view&id=27&Itemid=27

 

[Cauhtemoc]

Full schematic is can be found here.

 

[Gordy]

fossil2k, the designer of that is peranders on this forum.

Although I have not used his designs, I know of people who have done so with success.

 

[fossil2k]

I'm thinking of building the super regulator to replace those normal LM78 & 79 in my CPD. Now, I have to open up the hood to see if there is enough space to fit in the boards.

 

[fossil2k]

Have you seen other circuits in his website? Does the bridge rectifier make significant different for an amplifier?

 

[ilimzn]

Direct paralelling of BJTs and OP-amps? I'm not convinced, sorry.

 

[jan.didden]

Some info on practical building an ORIGINAL superreg is here:

http://www.linearaudio.nl/Documents/Regs_for_High_Perf_Audio_3.pdf .

The original design series is here:

http://waltjung.org/PDFs/Regs_for_High_Perf_Audio_1.pdf

Part 2 is also on Walt's site.

Jan Didden

 

[peranders]

Direct paralelling of BJTs and OP-amps? I'm not convinced, sorry.

This is an option for two types of parts, SO08 or DIL08 opamps and TO126 or TO220 transistors. I normally try to have more than one alternative especially when it comes to essential parts like semiconductors.... so only one type at the time

More to read about the super regulator
http://www.diyaudio.com/forums/showthread.php?s=&threadid=20937

It's quite right that I have got inspiration from Didden/Jung.

 

[AndrewT]

This is an option for two types of parts, SO08 or DIL08 opamps and TO126 or TO220 transistors. I normally try to have more than one alternative especially when it comes to essential parts like semiconductors.... so only one type at the time

one PCB for four different packaging options opens up the marketability of the product.

 

[fossil2k]

It is really interesting to try this circuit in my cdp. But I need some advise on the board design. It is good to squeeze all the components into a small PCB or do I just design a PCB in a "normal" size?

 

[peranders]

If you plan to use a 40-50 MHz opamp like AD825, the physical pcb layout is quite important in order to get a stable and a good performance. Small dimensions is good here.

 

[fossil2k]

My notebook HDD just crashed and those schematic I downloaded is gone! Will take some time off to fix the HDD problem...

 

[peranders]

Just stumbled over this old thread when I checked my statistics, fossil is your HDD alive now and did you tweak your CDP anything?

 

[fossil2k]

HDD can't be fixed..all info gone. I have not started anything yet but recently when I pop up my Naim power amp, I saw they are using LM317 regulating 24V for the pre amp..now it makes my imagination wild again..to maybe try putting this into it to replace the LM317..

 

[peranders]

Is it wonderful if you'll use a Mac with backup built-in in the OS!
YouTube - OS X Leopard Time Machine
Apple - Find Out How - Mac Basics

Have you started to take backup copies now?

Anyway a super regulator won't make it worse. I'm fairly sure about that.

 

[dsolodov]

resistors

BOM specifies 0.600W resistors. Can those be substituted with a lower power rating, i.e. 1/4W or 1/5W? I build my BOMs for 5V and 9V versions.

 

[dsolodov]

Multicomp LEDs are not available in the USA without 20$ order fee from Farnell... I found similar LED HLMP-1503-D0000 with 10mA current and 2.1V forward voltage. Is the replacement acceptable?

 

[peranders]

500-600 mW resistors are recommend. Any red/yellow/green LED will do.