DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 183

Nosian · 30th May 2012, 07:07 PM

hi everyone, some time ago i was looking for a simple low-volt low-impedance low-noise psu to this dac and i found this on some blog that dose not works anymore. i wonder if it is real? works? or ... any idea?

atupi · 30th May 2012, 07:58 PM

I've seen this "capacitorless" power supply on DAC designed by a russian guy but i can't remember the name now. Worth a try and would be good if someone more knowleageable (like Andrew) would say something about this design.
You can try the shunt regulator used by Dario in his MyRef_FE.

erin · 31st May 2012, 02:48 AM

Quote:

Originally Posted by Nosian

hi everyone, some time ago i was looking for a simple low-volt low-impedance low-noise psu to this dac and i found this on some blog that dose not works anymore. i wonder if it is real? works? or ... any idea?

It was designed by diyaudio member Nazar_lv diyAudio - Creative High end audio

His website is here http://overture.org.ua/?cat=27

He is one of the best engineers on this forum. Of course it would work.
The explaination of the circuit is on the link above. Happy reading.

Nosian · 31st May 2012, 07:15 AM

atupi or Dario i searched the forum for MyRef_FE but i came back to this post!!!
do you know any direct link?

Nosian · 31st May 2012, 07:17 AM

and i found

at TNT: "... where the 431 is used as a shunt-controlling amplifier driving an emitter follower. Output impedance can be much lower than with a solitary TL431. No noise measurements were done (yet), but I expect them not to be substantially different from the above ones...."

any comments? suitable to this dac?

Sergelisses · 31st May 2012, 07:28 AM

Quote:

Originally Posted by Nosian

hi everyone, some time ago i was looking for a simple low-volt low-impedance low-noise psu to this dac and i found this on some blog that dose not works anymore. i wonder if it is real? works? or ... any idea?

Strange

the LM1117 is a 3.3v for 3.3v output.......

I tried it ( +5v ) a few weeks ago for the AK4396 +5v Ana .
For me the SALAS Shunt reg is better .

It's my opinion

Serge

slider2828 · 31st May 2012, 08:04 AM

Hi Everyone,

I am actually in need of some help.... I just got one of these Gigawork Dacs with a PCM1794+DI9001+PCM2902E

Upsampling 24bit/192 DAC KIT,TOROID TRAN,USB, PCM1794+DIR9001 | eBay

My problem is with the Toroidal Transformer. I am pretty sure I have the wires going to the board right, but the AC IN wires I just want to make sure. They are 4 wires (2red, 2black). I twisted the 2 red wires together and 2 black wires together for 110V. Then basically I put them into a plug / socket that goes into the wall.

The closest I got was two 12V LEDS to come on the board, nothing else. No Sound or Anything... Any help would be greatly appreciated!

50AE · 31st May 2012, 08:15 AM

I built the Salas shunt and I highly recommend it!

hotiron · 31st May 2012, 10:44 AM

Can you post a pic of your transformer Slider?

haik · 31st May 2012, 01:34 PM

And what do you measure as secondary voltages? Also, what colors on the secondary winding do you have, and how much volts do they give (without load).

31st May 2012, 10:44 AM	#1829
hotiron diyAudio Member Join Date: Feb 2007 Location: Aberdeen Scotland	Can you post a pic of your transformer Slider? __________________ If you give up easily Dont start!!

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30th May 2012, 07:58 PM	#1822
atupi diyAudio Member Join Date: Oct 2010 Location: Bucharest	I've seen this "capacitorless" power supply on DAC designed by a russian guy but i can't remember the name now. Worth a try and would be good if someone more knowleageable (like Andrew) would say something about this design. You can try the shunt regulator used by Dario in his MyRef_FE.

31st May 2012, 07:15 AM	#1824
Nosian diyAudio Member Join Date: Jun 2011	atupi or Dario i searched the forum for MyRef_FE but i came back to this post!!! do you know any direct link?

31st May 2012, 07:17 AM	#1825
Nosian diyAudio Member Join Date: Jun 2011	and i found at TNT: "... where the 431 is used as a shunt-controlling amplifier driving an emitter follower. Output impedance can be much lower than with a solitary TL431. No noise measurements were done (yet), but I expect them not to be substantially different from the above ones...." any comments? suitable to this dac?

31st May 2012, 08:04 AM	#1827
slider2828 diyAudio Member Join Date: May 2012	Hi Everyone, I am actually in need of some help.... I just got one of these Gigawork Dacs with a PCM1794+DI9001+PCM2902E Upsampling 24bit/192 DAC KIT,TOROID TRAN,USB, PCM1794+DIR9001 \| eBay My problem is with the Toroidal Transformer. I am pretty sure I have the wires going to the board right, but the AC IN wires I just want to make sure. They are 4 wires (2red, 2black). I twisted the 2 red wires together and 2 black wires together for 110V. Then basically I put them into a plug / socket that goes into the wall. The closest I got was two 12V LEDS to come on the board, nothing else. No Sound or Anything... Any help would be greatly appreciated!

31st May 2012, 08:15 AM	#1828
50AE diyAudio Member Join Date: Jul 2011 Location: Sofia, Bulgaria	I built the Salas shunt and I highly recommend it!

31st May 2012, 01:34 PM	#1830
haik diyAudio Member Join Date: Mar 2012	And what do you measure as secondary voltages? Also, what colors on the secondary winding do you have, and how much volts do they give (without load).