USB tube DAC£¬High-quality£¬Perfect design

[Jacky Ling]

We DIY Working Group£¬design a USB tube DAC¡£The main channel is usb interface£¬direct input to PCM2707£¬and then directly through the I2S input directly PCM1798£¬then through four separate operational amplifier IC for I / V conversion£¬Tube output buffer stage output£¬buffer to adjust the sound level£¬also can use jumper to selected to determine whether the tube buffer stage£¬specially design multi-channel power£¬can be for headphone amplifier£¬the entire line Simple and clear£¬Pipeline Design¡£
The DAC also psimultaneously rovides two-way digital signal output: Coax and Fiber

In addition£¬tube and power supply to buy their own£¬but We are presented with two tubes PCB package

 

[Jacky Ling]

can use our power supply
1)15V 0 15V 60V--------25W

2)15V 0 15V-------------15W(for headphone amplifier)

3)8V 0----------------- 16W

110V--220Vac

An externally hosted image should be here but it was not working when we last tested it.

In addition£¬We also designed a shell£¬headphone amplifier£¬then the power supply, headphone amplifier, usb tube DAC, assembled together£¬you can see£º
1£¬Loaded into the transformer

2£¬Insurance and wiring installed£¬Red for the line of fire

3£¬After the installation of transformers like

4£¬Then loaded PCB

5£¬Connection£¬Please be sure to remember the location of line£¡

6£¬Installed to connect the line headphone amplifier board

7£¬All the installation is complete£¡£¡

front£º
http://www.hifidiy.net/jhwz/200707/W020070713835631715719.jpg

Backlight lamps installed£º

Hot melt adhesive with a fixed background light £º

consummation£¡£¡

Power on£¡£¡

can use computer to be switched on

 

[analog_sa]

Perfect design? But using a 2707?!

Have we not seen this on Ebay already?

 

[Alchamist]

perfect job.ım shocking!

 

[Jacky Ling]

Perfect design? But using a 2707?!

Have we not seen this on Ebay already?

No£¬we have not sell on ebay.

The face of low-end market, I think it is quite a good¡£

Shape design and Circuit board design£¬I think it is almost perfect¡£

Of course, we will work harder and do better

thanks
Jacky

 

[wwenze]

Perfect design? But using a 2707?!

Have we not seen this on Ebay already?

Then what else do you expect to use to get USB -> I2S to feed the PCM1798?

eBay maybe not, taobao and other Chinese websites, yes.

 

[analog_sa]

Then what else do you expect to use to get USB -> I2S to feed the PCM1798?

I also use a 2707 but do not call it "perfect" as it really demands some kind of reclocking. An asyncronous chip would better fit this description.

 

[analog_sa]

eBay maybe not,

Maybe yes

http://cgi.ebay.com/Hi-End-USB-DAC-...in_0?hash=item45eb716b7c&_trksid=p3286.c0.m14

 

[tritosine]

perfect job.1m shocking!

whether you meant this funny or not I admit it made my day

 

[Jacky Ling]

Maybe yes

http://cgi.ebay.com/Hi-End-USB-DAC-...in_0?hash=item45eb716b7c&_trksid=p3286.c0.m14

Amazing£¡We worrking group does not sell on ebay£¬and the price is equally alarming£¡Also he buys from Chinese websites£¬then turn to sell on ebay£¬this product has listed more than a year ago


Jacky

 

[korben69]

Hi, what do you mean saying "the price is equally alarming" ?

 

[Jacky Ling]

Hi, what do you mean saying "the price is equally alarming" ?

Hi,Because there is a reply above that on ebay to see this product£¬so according to his link£¬I enter£¬and see the price on ebay£¬then I said "the price is equally alarming"

Jacky

 

[analog_sa]

What is so alarming? Assuming the components are not fake it seems fair.