CS4397 dac

[leo]

Nice work!

Where did you get the case?
Also is thetube pcb your own or is it one you brought?

[Makgajwer]

The cases You can buy at http://www.modu.it/
The tube pcb is not my own project, I bought them from my acquaintance.

[hafp]

This is my first post on this message board.
Have followed this thread for some time now, and have modded a few of these small DAC kits during the past couple months.
Someone on another forum suggests connecting pin 20 on the CS8416 chip directly to a +5v source via a 47k resistor.
Has something to do with the PLL configuration when used in conjunction with the CS4397 chip.
Connecting pin 20 as noted above supposed to help lower jitter in this configuration.
Have any of you had experience with this.
I'm basically a parts swapping DIY guy, so the techinical stuff is way above my head.
Cheers.

[Ciu]

Hello Makgajwer !

Would you share about the schematics you used in CS4397 output ?

Thanks
R.C.

[Makgajwer]

Preview

Quote:Originally Posted by Ciu
Hello Makgajwer !

Would you share about the schematics you used in CS4397 output ?

Thanks
R.C.

Why not?



You must omit and bypass C2, it's drawing error.
And there is another (cheap) CD with this DACboard built in:

[Makgajwer]

Why the hell my attachments disappeared?

[Makgajwer]

once again

[Ciu]

Hello

Thanks for the schematics...
Would you add values to components ?
I had a look to sowter 4603... accept offset DC from DAC (2.5v ?) on input without cap blocking ?

Thanks
R.C.

[Makgajwer]

Ah, yes, I forgot to add values.

C1 omit and bypass, it's drawing error
R1 and R2 forms divider. Choose values to set about 2V signal level at output.
R2- 220ohm if Ua is about 200V
R4 1meg or so
C3 2uF or so, polypropylene, teflon or paper in oil


Sowter needn't to accept an offset DC, because there isn't any offset DC between (+)out and (-)out from DAC. Both of them have +2,5V potential according to the GND. So there is NO differential DC voltage between them (unless CS4397 is fried).

[Ciu]

Hello Makgajwer!

You are absolutely right about DC offset !
Thanks
R.C.