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quanghao 18th April 2011 07:24 AM

DAC-END The best DAC AD1865- UPDAT 2011
After a period of DAC-END2 board design development, I received a lot of feedback from you guys - DIY’ers over the whole my country and over the world. I really appreciate your all encouragement and support, especially the full support with favorable conditions from the VNAV and DIYAUDIO forum board management. The comments from you (praise and blame) have made me think a lot and come to a determination of creating a new DAC board design that overcomes the existing disadvantages and raises the advantages of the basic design.
I am honored to present to you the new design of DAC-END up dat 2011.
Hereinafter are some of characteristics/feature that I was expected in this PCB design:

• The PBC board is designed with completely new concept.

• Optimization of the signal circuit lines, clear direction, consistency, shortest as possible, to avoid cross infection.

• The mass system circuits are AC’s isolation between the analog signal processing and digital signal processing section.

• Anti-interference design screens for the entire grid circuit

• The Optical Input port are added beside Coaxial Input

• The Electronic Surface Mounted Components are applied for complying with the new PCB optimized design.

• Re-clocking option are considered for future upgrade

I believe that your comments in the past and future come with my efforts shall make DAC-END3 board continues bringing new exciting experiences in our DIY fields; especially when you are the one who turn it into reality.

Thank you very much for your attention!

quanghao 19th April 2011 10:01 AM

1 Attachment(s)
This is cricuit

CoolJazz 19th April 2011 10:06 AM

Sweet! Very interested.

Will there be a complete kit?

quanghao 19th April 2011 02:37 PM


Originally Posted by CoolJazz (
Sweet! Very interested.

Will there be a complete kit?


quanghao 19th April 2011 02:57 PM

2 Attachment(s)
And this layout of DAC!
The chips are arranged very close together, noise reduction, the best signal!
The street circuit is running a separate signal layers
The road runs its own power circuit layer
GND and DGND plane separated and connected by inductors

Please see the image!

JohnGeneva 20th April 2011 05:23 PM

quanghao, will there be a run of boards in a group buy, I would like to participate. Let me know if you are going to do this, or a run of your last End Dac 2 boards. Thanks, John

mkanna 20th April 2011 06:38 PM

Cool board layout!
I'm interested in a group buy, too.
Thankyou for pursuing this.


quanghao 21st April 2011 01:21 PM


Originally Posted by mkanna (
Cool board layout!
I'm interested in a group buy, too.
Thankyou for pursuing this.


Yes! i test new PCb, i will do that!

quanghao 21st April 2011 01:30 PM

The IV All in one, can use tube:5687, 6h30,6Dj8
2 Attachment(s)
And now is the layout for stage IV, I called all in one

1. Using different tube types, including: 5687, 6h6, 6h30, 6dj8 ...
Change the tube simply by changing the connector on the motherboard jum!

2. Can be used as a pre independence on the other tube

3.Phan Output capacitors are larger!

4. Options for the use of output transformers or capacitors or output downloads alone!
Invite your review!

quanghao 23rd April 2011 06:08 AM

2 Attachment(s)
This is test PCB

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