"Reference" TDA1541A DAC with I2S-BUS architecture - Page 86 - diyAudio
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Old 25th October 2012, 07:30 AM   #851
Pocoyo is offline Pocoyo  Indonesia
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Quote:
Originally Posted by dvb-projekt View Post
Hi Pocoyo,

the small pcb above the DAC V2.3 is the I2S switch (USB/SPDIF).

All BOMs you will find in my blog HERE.

Hi Oliver

I think i will build your dac with simple structure (No Need USB)
can i connect the digital input / RCA to TDA 1541 PCB ?

so the pcb we need (pls corect me if something missing)
1. PSU Pcb
2. Shunt Reg PCB
3. Shunt Reg +5v PCB (optional)
4. TDA 1541 PCB
5. HV Shunt Reg PCB
6. Tube i zator PCB
7. ??? (what for)

Thank you Oliver, best regards
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Old 25th October 2012, 04:15 PM   #852
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Quote:
Originally Posted by Pocoyo View Post
Hi Oliver

I think i will build your dac with simple structure (No Need USB)
can i connect the digital input / RCA to TDA 1541 PCB ?

so the pcb we need (pls corect me if something missing)
1. PSU Pcb
2. Shunt Reg PCB
3. Shunt Reg +5v PCB (optional)
4. TDA 1541 PCB
5. HV Shunt Reg PCB
6. Tube i zator PCB
7. ??? (what for)

Thank you Oliver, best regards
Hi Pocoyo,

my DAC has a I2S input. If you want to use a Digital RCA (S/PDIF) input you need two additional pcbs.

1st the S/PDIF to I2S converter, e.g. the Twisted Pear S/PDIF Tranceiver Module

2nd my UHS-Buffer Module

It looks like here:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


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Last edited by dvb projekt; 25th October 2012 at 04:24 PM.
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Old 26th October 2012, 06:08 PM   #853
Pocoyo is offline Pocoyo  Indonesia
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just asking before buying

is that right tda1541 use 12pcs x 0.22uf wima ?
if i look in the other structure they used 0.022 uf

looks like i need to buy from you
- 2 pcs UHSB, still got in the stock ?

btw
- i didnt look you use I2S switch pcb what happen ?
- as u give a bigger tda1541 pcb, is that ok if i cut the
pcb below " master / slave " ? any distortion later ?
( i need a little pcb, so easier to put into 1 chassis )
- if i look in page 48 there is mods ssr from 5v to 3.3v
what for the mods ?

best regards
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Old 28th October 2012, 02:46 AM   #854
Pocoyo is offline Pocoyo  Indonesia
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Quote:
Originally Posted by Pocoyo View Post
btw
- i didnt look you use I2S switch pcb what happen ?
- as u give a bigger tda1541 pcb, is that ok if i cut the
pcb below " master / slave " ? any distortion later ?
( i need a little pcb, so easier to put into 1 chassis )
- if i look in page 48 there is mods ssr from 5v to 3.3v
what for the mods ?
i got the answer on page 50
- i2s switch for other signal input maybe for i pad
- i can cut the board it will be green baron
- mods for uhsb from ecsdesign / john brown

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Old 4th November 2012, 04:18 PM   #855
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Default Help needed.....

Hello everyone.

I've owned this DAC for a long time and enjoy it very much...thanks Oliver! I've also recently added The Red Baron board...even better. I utilize the Teralink X2 (no clock mods - I can't microsolder, but I did do the 5V and 3.3V shunt mods)

My original build is posted #571.

The "digital landscape" is changing rapidly and I'm starting to try new/different USB to I2S converters. I recently purchased this one in I2S output:

TAS1020B-based Asynchronous USB to I2S/SPDIF converter 24bit/96kHz

My problem is that the output is faint music covered with a veil of static and hiss. The creator of the board has been extremely responsive and helpful, but he doesn't understand the dac chip like the folks here. I know there are no problems with the DAC board, as I reconnected the X2 and everything was back to normal. You can't see the I2S connections, as they're under the board, but I've rechecked multiple times and they're correct. I think I'm missing something silly here.....

Input welcome....

I'm attaching a picture of the build (and yes, that's a Barbie...long story)
Attached Images
File Type: jpg Red Baron Build.jpg (797.8 KB, 354 views)
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Old 5th November 2012, 11:26 PM   #856
neda is offline neda  United States
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Hi Crobinns5421,
How was the sound before the Red Baron? Any noise at full volume with no music playing? The reason I ask is, I too upgraded to the Red Baron, and now I
have some sort of ground loop making the unit inoperable. I'm in the process of trying to quite this thing down.

Where is your star ground point? I don't see it in the picture.

Ned
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Old 6th November 2012, 12:33 AM   #857
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Default I didn't use one...

I didn't use a star ground before or after The Red Baron. With the Teralink X2, there is no noise whatsoever...
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Old 11th November 2012, 11:50 AM   #858
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Default USB and Digital Ground Points...

Oliver (and everyone),

I looked at your system picture, but I couldn"t tell where you had the following grounded:

1. 5V High Speed Buffer
2. USB Isolator
3. Digital Power on Red Baron
4.USB to I2S Converter

Thanks!
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Old 11th November 2012, 12:48 PM   #859
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Quote:
Originally Posted by crobbins5421 View Post
Oliver (and everyone),

I looked at your system picture, but I couldn"t tell where you had the following grounded:

1. 5V High Speed Buffer
2. USB Isolator
3. Digital Power on Red Baron
4.USB to I2S Converter

Thanks!
Hi Chris,

1. High Speed Buffer GND to +5V Shunt GND
2. USB Isolator GND to +5V Shunt GND
3. You could use only one (Analog/Digital) GND of the Red Baron, because they are star grounded on the pcb. Connect the GND to the TDA1541A Shunt GND. (see attached photo)
4. USB to I2S Converter GND to +5V Shunt GND

I hope this helps! BTW, i will dispatch your two ordered add. UHS-Buffer tomorrow.

Attached Images
File Type: jpg SAM_0912.jpg (1,010.4 KB, 291 views)
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Old 11th November 2012, 01:44 PM   #860
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Default Thank you!

Thanks Oliver.

Could you also send me:

(1) +/- Power Supply Board
(1) 5V Shunt Board
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