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

Group Buys Members group buys

Group buy: SSR03 Super Regulator Power Supply Board
Group buy: SSR03 Super Regulator Power Supply Board
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 January 2018, 02:01 PM   #101
fred sonnen is offline fred sonnen  Germany
diyAudio Member
 
Join Date: Dec 2014
Quote:
Originally Posted by peranders View Post
Please notice the pin 1 marks on the opamp. That is the important thing. Anyway, if you have a very stable output voltage when you load the outputs, then it works.
I followed the tech. info which is linked at the Farnell item site. And of course your PDF.
Question is: is it OK that pin 2+3 are measure the same but different on the "+" and "-" side of the SSR03?
At Vout + and - I get 15,8V. Where does the difference to 15V comes from?
  Reply With Quote
Old 4th February 2018, 08:04 PM   #102
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: SSR03 Super Regulator Power Supply Board
If you have the same voltage on pin 2 and 3, that means you have a working feedback. The LM329 has a tolerance and aslo the resistors, therefore you will have a small difference in output voltage. If you get 15.8 volts instead of 15.0 V, it is tolerances. If you had chosen the LM431 you would have gotten a better result.
__________________
/Per-Anders (my first name) or P-A as my friends call me.
SSR03 group buy. Sign up for interest HERE. 15 pcb's in order. 0 paid.
  Reply With Quote
Old 5th February 2018, 11:44 AM   #103
fred sonnen is offline fred sonnen  Germany
diyAudio Member
 
Join Date: Dec 2014
Quote:
Originally Posted by peranders View Post
If you have the same voltage on pin 2 and 3, that means you have a working feedback. The LM329 has a tolerance and aslo the resistors, therefore you will have a small difference in output voltage. If you get 15.8 volts instead of 15.0 V, it is tolerances. If you had chosen the LM431 you would have gotten a better result.
OK, thank you.
But on the other side my understanding is that the 329 is less noisier than the 431. Is this right?
  Reply With Quote
Old 6th February 2018, 05:53 AM   #104
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: SSR03 Super Regulator Power Supply Board
The opamp is the only noise source since you have a have lowpass filter on voltage reference.
__________________
/Per-Anders (my first name) or P-A as my friends call me.
SSR03 group buy. Sign up for interest HERE. 15 pcb's in order. 0 paid.
  Reply With Quote
Old 6th February 2018, 06:33 AM   #105
fred sonnen is offline fred sonnen  Germany
diyAudio Member
 
Join Date: Dec 2014
OK, that means: YES The 431 is more flexible but noisier than the 329.
Are there any other things to consider when deciding on 431or 329?

You had suggested testing the SSR03 with a load resistor. Could you give me a basic recommendation as to what I should be aware of and what is worthwhile?
Am I right I nned two: connecting Vout+ and ground; connecting Vout- and ground
Thank you
  Reply With Quote
Old 6th February 2018, 04:34 PM   #106
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: SSR03 Super Regulator Power Supply Board
As a load you use Ohm's law R = U/I 100 mA could be a suitable test current.

If you use a LM329 then you have a higher limit for the lowest output voltage. As I told you the noise is of no importance since you remove all noise with a filter. The opamp stands for 100% of the noise if you have seen the measurement done by jackinnj.
__________________
/Per-Anders (my first name) or P-A as my friends call me.
SSR03 group buy. Sign up for interest HERE. 15 pcb's in order. 0 paid.
  Reply With Quote
Old 12th February 2018, 04:47 PM   #107
fred sonnen is offline fred sonnen  Germany
diyAudio Member
 
Join Date: Dec 2014
Default SSR03 usecase

I will use the SSR03 for 3x analouge X-over. The power supply for them is rated with:
15 – 17V and

5VA each

I also will use a SSR03 for a Class-A DCG3 PreAmp which is rated with:
16 – 17V and
30 – 50W

Is it a praktical usecase to use one 17V SSR03 for 3x X-over and the DCG3 class-A PreAmp?
What is a reasonable limit of
mA for an SSR03?


According to your SSR03 BOM the different between a Volts equal 431 and 329 are:
R31/32 and VR1/2 are different and

R39/40, R43/44, R45/46 are new


According to the P1/2 Trimpoti:
They are mentioned in the PDF. But I do not find them within your BOM.

Where do I find techn. infos / parameters for the P1/2 trimpotentiometer?

From your website:
„The reference (positive side)
…. The LM431 (thick outline in the silkscreen print) has four resistors R39, R41, R43, R45 (R40, R44, R46) and a trimpotentiometer P3 in order to trim the reference voltage. You can't trim the LM329.
The feedback network (positive side)
The feedback network is R25+R27 as the upper part. R25 is normally a wire and is used for trimming purposes. R31 in parallel of R33 is the lower part of the feedback and R31 is for trimming also. P1 can also be used if you want a variable output voltage, recommended if you use a fixed voltage reference like the LM329.“
Do these statements not oppose each other?

Last question:
BOM for 15V and 18V are available, but perhaps I do need 17V (see above):
Am I right taking a 431 SSR03 in that case and using the P1/2 trimpotentiometer to get the 17V. Is the 15V or 18V SSR03 the PSU to get 17V? Or do I even need a new BOM?


Thank you for your attantion



Last edited by fred sonnen; 12th February 2018 at 04:49 PM.
  Reply With Quote
Old 12th February 2018, 07:59 PM   #108
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: SSR03 Super Regulator Power Supply Board
Up to 700 mA is possible with some changes but you will most likely need more cooling.

The trim pot is a place holder so use it if you think it's convenient. The type can be found in the BOM for the whole design but the value may not be correct for your purposes.

The P1 can be used for trimming the gain and the P3 for trimming the reference voltage if you have that kind of reference.

I recommend that you use the 15 V BOM and trim the LM431 in the R45 position. You have the formula at my homepage but if it makes it easier for you, calculate for 8.5 V reference voltage, assuming that the gain is set to 2.
__________________
/Per-Anders (my first name) or P-A as my friends call me.
SSR03 group buy. Sign up for interest HERE. 15 pcb's in order. 0 paid.
  Reply With Quote
Old 13th February 2018, 08:41 PM   #109
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Group buy: SSR03 Super Regulator Power Supply Board
A 17 V BOM is added in case someone else is interested.
__________________
/Per-Anders (my first name) or P-A as my friends call me.
SSR03 group buy. Sign up for interest HERE. 15 pcb's in order. 0 paid.
  Reply With Quote
Old 15th February 2018, 01:23 PM   #110
fred sonnen is offline fred sonnen  Germany
diyAudio Member
 
Join Date: Dec 2014
Quote:
Originally Posted by peranders View Post
Up to 700 mA is possible with some changes but you will most likely need more cooling.
Am I right saying the PSU is capable delivering roughly 10W@17V?
If so that is not enough to feed the DCG3 (20-30W@17-18V) preamp. but enough for the x-overs (5-7W@15-17V) as originally planned ;-) It is certainly not enough for both together, as I had considered the last days.
But thats fine
  Reply With Quote

Reply


Group buy: SSR03 Super Regulator Power Supply BoardHide 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
Group Buy: SSR03 Super Regulator Power Supply peranders Group Buys 406 28th March 2018 11:21 PM
High quality PCB board for amplifier power supply - group buy supernet Group Buys 43 12th October 2015 08:22 PM
Opamp power supply, super regulator alternatives? imperfectcircle Power Supplies 33 3rd May 2007 07:55 PM
super regulator vs a good stiff LCLCLC power supply audionut Parts 4 30th April 2007 08:01 PM


New To Site? Need Help?

All times are GMT. The time now is 01:13 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki