Output transformers for DACs

[bisesik]

Not yet, but here is the drawings of transformers for new design:

View attachment maxx-mil_pcb_type.pdf

 

[yunyun]

Not yet, but here is the drawings of transformers for new design:

View attachment 794444

I mean an IV PCB that can be used with the Buffalo-IIIsePro38, such as the PCB designed by Ian.





In fact, you only need to follow Ian's design to increase your transformer installation position. It can be applied to both Buffalo and Ian's DAC. You don't need to design two boards.

 

[bisesik]

Got it, good idea. I have no time right now, but will do it as soon as it possible. Thank you.

 

[paoloilpizzo]

Many big thanks to Ivan, the transformer really sound fantastic!

I recognise most of the components in the picture but not the board under the tower raspi + DAC + transformers
What is it?

 

[yunyun]

Got it, good idea. I have no time right now, but will do it as soon as it possible. Thank you.

I plan to design a PCB for buffalo DAC. Can you tell me the dimensions of the transformer and the position of 6 pins.

 

[bisesik]

I plan to design a PCB for buffalo DAC. Can you tell me the dimensions of the transformer and the position of 6 pins.

All the dimensions are actually can be taken from pdf I have posted previously. Here are the positions:
Pin #13= 0,0
Pin #1= -17.31,-10
Pin #2= -19.98,0
Pin #3= -17.31,10
Pin #4= -10, 17.31
Pin #5= 0,19.98
Pin #6= 10, 17.31
Pin #7= 17.31,10
Pin #8= 19.98,0
Pin #9= 17.31,-10
Pin #10= 10, -17.31
Pin #11= 0,-19.98
Pin #12= -10, -17.31

 

[yunyun]

All the dimensions are actually can be taken from pdf I have posted previously. Here are the positions:
Pin #13= 0,0
Pin #1= -17.31,-10
Pin #2= -19.98,0
Pin #3= -17.31,10
Pin #4= -10, 17.31
Pin #5= 0,19.98
Pin #6= 10, 17.31
Pin #7= 17.31,10
Pin #8= 19.98,0
Pin #9= 17.31,-10
Pin #10= 10, -17.31
Pin #11= 0,-19.98
Pin #12= -10, -17.31

Is this a new version of the transformer? Originally only 6 pins

How is the transformer connected to the input and output?

 

[bisesik]

I wonder what 6 pins are you talking about? Previously was the 9-pin version only and before that was the wires version. For now I am planning to making 13-pin version only, because I feel uncomfortable to manufacture two versions at the same time taking into account that 13-pin version is more durable\safer in terms of usage. I will provide connection schematics a bit later...

 

[yunyun]

I wonder what 6 pins are you talking about? Previously was the 9-pin version only and before that was the wires version. For now I am planning to making 13-pin version only, because I feel uncomfortable to manufacture two versions at the same time taking into account that 13-pin version is more durable\safer in terms of usage. I will provide connection schematics a bit later...

13 pins version for single channel？ or two Chanel?

 

[bisesik]

One transformer - one channel

 

[bisesik]

Here is the schematics for using all the 6 coils with ES9038PRO (stereo mode) or with AK4499 in Dual Mono mode.

 

[yunyun]

Here is the schematics for using all the 6 coils with ES9038PRO (stereo mode) or with AK4499 in Dual Mono mode.

View attachment 795438

The buffalo DAC has only three input pins for one channel. How can I connect the buffalo to a transformer with 8 input pins?

 

[bisesik]

If there is no possibility to organize separate outputs mode, then the connection can be simplified to:

 

[bisesik]

Or even down to:

 

[yunyun]

If there is no possibility to organize separate outputs mode, then the connection can be simplified to:
View attachment 795447

I Understand that the transformer's 3-8 pin does not need to be connected to buffola DAC.

 

[bisesik]

This connection of coils is also possible in terms of versatility:

 

[bisesik]

I Understand that the transformer's 3-8 pin does not need to be connected to buffola DAC.

For this circuit https://www.diyaudio.com/forums/attachment.php?attachmentid=795447
yes, pins 3-8 are NC

 

[yunyun]

For this circuit https://www.diyaudio.com/forums/att...acs-es9038pro-dmak4499-1prim_2sec-_simple-jpg
yes, pins 3-8 are NC

For me, this transformer is complicated, I can't design a PCB. I wait for you to provide the PCB for buffola.

 

[TioFrancotirador]

@bisesik

Ivan does you trafo for DSC will also work with this new project ?
https://www.diyaudio.com/forums/digital-line-level/345385-star-pure-dsd-dac-signalyst.html#post5978206

 

[bisesik]

Definitely yes