Bragi, an Asynchronous ES9023 DAC with isolated I2S Input and Alps RK27 Volume pot - Page 2

Neutrality · 27th September 2012, 05:09 PM

I made a few minor changes to the board yesterday and sent the Gerbers to the manufacturer.

Now the waiting begins.

Neutrality · 08:00 PM

This is the final schematic and layout that was sent to the manufacturer.

Overall, I must say that I am more than satisfied with how it ended up.

Took good care in ensuring an uninterrupted groundplane, good bypassing, decoupling with resistors and ferrites in appropiate places, input connector with 5 ground pins to ensure proper ground connection between source and DAC.

Neutrality · 10:50 PM

I am almost done assembling the board.

Just need to mount the ES9023 chip, connectors and the volume pot. The volume pot I already have, the ES9023 chip and connectors I will receive on Monday.

It will go together with this : Balder, OPA2134+BUF634 Headphone Amplifier

Once I get a supply board done it should fit nicely into a not too large cabinet.

Neutrality · 05:03 PM

Got it up and running.

Sent a 1kHz sine wave from my PC, through the TE7022 USB to I2S converter and then into the DAC board.

Output from the DAC board? A perfect 1kHz sine wave......

No listening impressions yet since I had no amplifier available at work but I should be getting around to listening to it sometime this week.

Anyway, I am happy that it works.

Pics might be incoming tomorrow.

rade95 · 11th November 2012, 09:53 PM

Hi, are you still taking orders for the PCB?

Neutrality · 11th November 2012, 10:09 PM

Quote:

Originally Posted by rade95

Hi, are you still taking orders for the PCB?

Well, I have not taken any orders since I just made this for my own personal use and there has not been any interest so far.

However, I do have a few left if there is any interest.

rade95 · 12th November 2012, 06:47 PM

Sorry for some reason I thought you were taking orders. I must have mixed the threads. If those you have left are based on the final design, I would like to purchase a pair. I could pay by PayPal. Let me know please. thanks

Neutrality · 13th November 2012, 06:26 PM

Quote:

Originally Posted by rade95

Sorry for some reason I thought you were taking orders. I must have mixed the threads. If those you have left are based on the final design, I would like to purchase a pair. I could pay by PayPal. Let me know please. thanks

I hope you can wait a week or so, just until I actually get to do some listening tests.

rade95 · 15th November 2012, 02:38 PM

Quote:

Originally Posted by Neutrality

I hope you can wait a week or so, just until I actually get to do some listening tests.

of course, no problem at all.

Neutrality · 19th November 2012, 04:59 PM

Crossposting from another thread. :

Got it(Balder) up and running today together with my ES9023 DAC(Bragi).

First impressions are very positive.

Detailed without being bright and plenty of control and power.

Tomorrow I will try it with a pair of cheap Sennheiser HD415 110dB/32 Ohm headphones as well as my "highendish" 96dB/250 Ohm Beyerdynamic DT 880 Pro headphones.

So basically I sound like everything is working as intended.

3rd November 2012, 10:44 PM	#13
Neutrality diyAudio Member Join Date: Oct 2004 Location: Aalborg, Denmark	I am almost done assembling the board. Just need to mount the ES9023 chip, connectors and the volume pot. The volume pot I already have, the ES9023 chip and connectors I will receive on Monday. It will go together with this : Balder, OPA2134+BUF634 Headphone Amplifier Once I get a supply board done it should fit nicely into a not too large cabinet. Last edited by Neutrality; 3rd November 2012 at 10:50 PM.

5th November 2012, 05:00 PM	#14
Neutrality diyAudio Member Join Date: Oct 2004 Location: Aalborg, Denmark	Got it up and running. Sent a 1kHz sine wave from my PC, through the TE7022 USB to I2S converter and then into the DAC board. Output from the DAC board? A perfect 1kHz sine wave...... No listening impressions yet since I had no amplifier available at work but I should be getting around to listening to it sometime this week. Anyway, I am happy that it works. Pics might be incoming tomorrow. Last edited by Neutrality; 5th November 2012 at 05:03 PM.

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27th September 2012, 05:09 PM	#11
Neutrality diyAudio Member Join Date: Oct 2004 Location: Aalborg, Denmark	I made a few minor changes to the board yesterday and sent the Gerbers to the manufacturer. Now the waiting begins.

11th November 2012, 09:53 PM	#15
rade95 diyAudio Member Join Date: Apr 2010 Location: Boulder, Colorado	Hi, are you still taking orders for the PCB?

12th November 2012, 06:47 PM	#17
rade95 diyAudio Member Join Date: Apr 2010 Location: Boulder, Colorado	Sorry for some reason I thought you were taking orders. I must have mixed the threads. If those you have left are based on the final design, I would like to purchase a pair. I could pay by PayPal. Let me know please. thanks

19th November 2012, 04:59 PM	#20
Neutrality diyAudio Member Join Date: Oct 2004 Location: Aalborg, Denmark	Crossposting from another thread. : Got it(Balder) up and running today together with my ES9023 DAC(Bragi). First impressions are very positive. Detailed without being bright and plenty of control and power. Tomorrow I will try it with a pair of cheap Sennheiser HD415 110dB/32 Ohm headphones as well as my "highendish" 96dB/250 Ohm Beyerdynamic DT 880 Pro headphones. So basically I sound like everything is working as intended.