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

Class D Switching Power Amplifiers and Power D/A conversion

Brainstorming Purifi 1et400a amps
Brainstorming Purifi 1et400a amps
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 15th January 2020, 06:59 PM   #111
Oneminde is offline Oneminde  Sweden
diyAudio Member
 
Join Date: Jun 2014
Location: Darkside of the moon.
Thanks for the info so far. Great stuff.
__________________
In order to become sane in an insane world, you must first become insane.
  Reply With Quote
Old 15th January 2020, 07:03 PM   #112
mocenigo is offline mocenigo  Germany
diyAudio Member
 
Join Date: Mar 2007
Location: My god, it's full of beer!
Quote:
Originally Posted by maty tinman View Post
Yes, Alexandar has two versions, one with a broader board and a slimmer but longer board with space for a little trafo. I asked him to assemble the regulator on the slimmer board and cut away (!!!) the part for the transformer, adding screw terminals instead. So I will get a nice 70 x 90 board that will sit next to the 60 x 90 board for the 0.56uV Ultralow noise DAC power supply regulator.

And early next week the universal buffer will be shipped!
  Reply With Quote
Old 15th January 2020, 07:16 PM   #113
maty tinman is offline maty tinman  Spain
diyAudio Member
 
maty tinman's Avatar
 
Join Date: Apr 2012
Location: Tarragona (Spain)
I have known for a long time that it is best to avoid everything that uses Hypex SMPS...
__________________
"Comment is free, but facts are sacred" - C. P. Scott *** 40 years of the Spanish Constitution, My musical celebration
  Reply With Quote
Old 15th January 2020, 07:17 PM   #114
Oneminde is offline Oneminde  Sweden
diyAudio Member
 
Join Date: Jun 2014
Location: Darkside of the moon.
Great stuff. I will follow the thread as per usual since I can't move on a purchase just yet.
__________________
In order to become sane in an insane world, you must first become insane.
  Reply With Quote
Old 15th January 2020, 07:18 PM   #115
maty tinman is offline maty tinman  Spain
diyAudio Member
 
maty tinman's Avatar
 
Join Date: Apr 2012
Location: Tarragona (Spain)
About Connex SMPS:

-> Review and Measurements of Neurochrome Modulus-286 Amp | Page 2 | Audio Science Review (ASR) Forum

-> Review and Measurements of Neurochrome Modulus-286 Amp | Page 2 | Audio Science Review (ASR) Forum
__________________
"Comment is free, but facts are sacred" - C. P. Scott *** 40 years of the Spanish Constitution, My musical celebration

Last edited by maty tinman; 15th January 2020 at 07:21 PM.
  Reply With Quote
Old 15th January 2020, 07:26 PM   #116
cab is offline cab
diyAudio Member
 
Join Date: Aug 2009
According to Bruno, the quality of the power supply is not critical.
  Reply With Quote
Old 15th January 2020, 07:30 PM   #117
maty tinman is offline maty tinman  Spain
diyAudio Member
 
maty tinman's Avatar
 
Join Date: Apr 2012
Location: Tarragona (Spain)
Not critical to... the amp module (1ET400A: PSRR > 90 dB, very good).
__________________
"Comment is free, but facts are sacred" - C. P. Scott *** 40 years of the Spanish Constitution, My musical celebration
  Reply With Quote
Old 15th January 2020, 07:39 PM   #118
Oneminde is offline Oneminde  Sweden
diyAudio Member
 
Join Date: Jun 2014
Location: Darkside of the moon.
I disagree on the not critical part. I've heard amps where the PSU noise is definitely an issue. Its not a brand or audiophile related statement, more that if the amplification stage is quieter than the PUS noise, then it is audible.
__________________
In order to become sane in an insane world, you must first become insane.
  Reply With Quote
Old 15th January 2020, 08:23 PM   #119
barrows is offline barrows
diyAudio Member
 
Join Date: Jul 2010
I must say I do not understand all the interest in the Neurochrome buffer board for Purifi projects? What makes anyone think the Neurochrome would offer any advantage over Purifi's eval buffer board? The Neurochrome is just another IC based design. Are you at all aware of the performance of the 1612 OPA for example, it is no slouch!
If we are looking for alternatives for an input gain stage, I would hope that some enterprising DIYaudio member who is adept at discrete circuit development might design a discrete alternative specifically for the Purifi amp modules, this could be a great project, and a really good discrete circuit has the potential to outperform IC based designs if a clever and talented individual designs it. could probably be a decent commercial project as well as it is pretty clear there is going to be a demand for alternative buffers for the Purifi modules.
  Reply With Quote
Old 15th January 2020, 08:32 PM   #120
Oneminde is offline Oneminde  Sweden
diyAudio Member
 
Join Date: Jun 2014
Location: Darkside of the moon.
Quote:
Originally Posted by barrows View Post
gain stage, I would hope that some enterprising DIYaudio member who is adept at discrete circuit development might design a discrete alternative specifically for the Purifi amp modules, this could be a great project, and a really good discrete circuit has the potential to outperform IC based designs if a clever and talented individual designs it. could probably be a decent commercial project as well as it is pretty clear there is going to be a demand for alternative buffers for the Purifi modules.
If it qualify as buffer (fully discrete) - this is the Pass Labs Universal Gain Stage, generation 4. If it does not fit the job or qualify as a buffer, then I apologizes.
Attached Images
File Type: jpg The heart and soul.jpg (469.0 KB, 304 views)
__________________
In order to become sane in an insane world, you must first become insane.
  Reply With Quote

Reply


Brainstorming Purifi 1et400a ampsHide 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
Purifi Audio by Bruno Putzeys and friends. ErnieM Multi-Way 191 6th April 2020 04:17 PM
Purifi 1ET400A Measurements Diomedian Class D 96 13th January 2020 09:03 AM
Brainstorming over different methods to convert op of TDA1543's freax Digital Line Level 4 25th November 2012 02:36 PM


New To Site? Need Help?

All times are GMT. The time now is 08:51 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki