Output transformers for DACs

[clay-speakers]

The transformer has dual primary’s & each primary is connected to the differential
output of a single DAC section.
I’m running the DAC in dual mono mode so two DAC outputs per channel.

 

[joseacm08]

Ian Dac 9038 Transformers

Biseik, PM sent. Information about Ian 9038 Dac Transformers.
Thanks and regards!!

 

[cbarth]

Some of the old and big Sony, Marantz and Philips players has dual mono TDA1541 chips. Is it possible to run 4mA + 4mA from these chips for a total of 8mA for the primary side of your transformers?

 

[bisesik]

cbarth, yes, but two primary coils (CT to GND) will be needed.

 

[cbarth]

cbarth, yes, but two primary coils (CT to GND) will be needed.

Ok, cool.
So like my 0,5+0,5:2+2 would work in this situation? Do you know if anybody has tried this configuartion?

 

[bisesik]

AFAIK nobody with my transformers, but I know a lot of people did similar connection in the past.

At least you can try and I will be really appreciated if you will back here with results

 

[Sven257]

Hi Ivan, 'bisesik'

So your I/V transformers can handle the high current (60ma P to P) of the Stereo ES9038 PRO,
what about the PRO in Mono (120ma P to P)
Would that require a larger core/transformer ??

 

[bisesik]

I have no such experience, can not answer, sorry.

 

[Sven257]

Okay,
Thanks for your quick reply.

 

[bisesik]

I mean... It is definitely possible to do with bigger core size, but it will be another individual approach with individual budget for R&D. Probably will be too costly for single DAC (within DIY).

 

[fab]

Hi bisesik
Just sent you a private message for transformers inquiry for AK4497 DAC output.
Thanks
Fab

 

[pinnocchio]

Hi Bisesik,

I have a Mirand AK4490 DAC and would like to try a transformer output. Do you already have a mezzanine PCB for it? The Mirand DAC uses a mezzanine PCB for output.

Thanks
Do

 

[bisesik]

Hi Do,
I have no a mezzanine PCB for output
What "mezzanine" means BTW? Something special in terms of pins\lines provided or is it just a name of 5x2 pin header?

 

[pinnocchio]

Hi Do,
I have no a mezzanine PCB for output
What "mezzanine" means BTW? Something special in terms of pins\lines provided or is it just a name of 5x2 pin header?

Hi bisesik,

Mirand uses another PCB on top of the DAC for the output. Here's the layout of the DAC board. J10 is a 5x2 header. They have opamp output board and two discrete output boards available but no transformer output.

AK4490 USB Dac with dsd support.




Thanks
Do

 

[nautibuoy]

What "mezzanine" means BTW?

Conventionally a mezzanine relates to a building and is a smaller sub-floor that is located between two main floors. In the context here it means a small PCB that sits above the main PCB.

 

[bisesik]

It is clear now, thank you guys!

 

[potstip]

What is your final decision for DSC 1:4 or anything else?
For the standard production your wire is pure industrial copper or OFC?

 

[bisesik]

Due to the restrictions of manufacturing efficiency in terms of time I am stopped on 1:4 version.
I use the old rare wire from USSR, and can not answer if there was any such terminology in that time

 

[bisesik]

fab, seems your PM box is full, can't send a message to you.

 

[potstip]

Hi. Has anyone tried the transformers of Bisesik on the dac DSC and can say an audio level the differences found compared to the chinese output transformers ?? Thank you.

I will buy transformers and share my detailed foundings here.