[ccschua]

hi alex
 
since the casing is full of boards and tranny, how do you plan to connect to the DAC ? using which connector ? DIN 8pin ?
 
how did you hook up the 1A EMI/RFI filter ? before the transformer or after ? can you point me the taobao link ?
 
isnt the choke in diyinhk does the same thing ?
 
this is really ultimate.
 
rgds

 

[abartels]

Hi ccschua,
 
There will be all twisted wires from the psu's to the dac, directly, no special connectors needed. Maybe I will use Molex connectors later on, for the moment
I will use sinmple "Jumper-like" connectors since I don't want to solder on the DAC terminals.
 
 
The filters are 230V EMI/RFI filters and they will be connected before the R-Cores. And yes, the chokes on the diyinhk psu's are comparable (different brand).
 
 
I hope I can finish the dac today, not sure though because it's a lot of connecting to realise.
 
 
 
Regards,
 
Alex

 

[wwmhf]

   
Some pics to get you guys a little bit warmed-up 

 




 
 
Next step is to mount all the filters, R-Cores and psu's, a lot of cabling,,,,,
 
 
Regards,
 
Alex

 
Never saw so many transformers in one box???!!!

 

[abartels]

   
Some pics to get you guys a little bit warmed-up 

 




 
 
Next step is to mount all the filters, R-Cores and psu's, a lot of cabling,,,,,
 
 
Regards,
 
Alex

 
Never saw so many transformers in one box???!!!
 
 
I never saw that too, that is why I did build this monster myself 

 
 
Today, after 6 days of burn-in time, finally listening to my DAC.
 
I only can say this: It's ALIEN, it fills the room with music, live like, nothing more to wish for it seems!!!!!!
 

 
I made a miscalculation, DAC psu for output stage needs 2x 15V, and NOT a transformer with a center pole, so I had to exchange the USB-R-Core for a second 15-0-15V R-Core.
This means I will have to order a new 2x 15V R-Core and built it in later. For the moment I use external 5V for USB (battery)
 

 
 
Regards,
 
 
Alex

 

[ccschua]

congrats.
 
this is really great. can I bring a suggestion. why not consider a isolating tranny (R-core) for the digital and analog circuits each. it can be a 1 to 1 tranny.

 

[abartels]

Good thinking, would love to add 2 osolation R-Cores, but those wouldn't fit in this enclosure. Maybe next DAC project

Regards,

Alex

 

[ccschua]

with the 1 to 1 Rcore, i dont think the EMI/RFI filter is required, especially if the isolation trans has earthing cable.

 

[abartels]

NOT goog thinking.
 
What I tried to accomplish with this DAC was to "completely" get rid of EMI/RFI. An isolation transformer in addition could bring better performance.
 
 
It's like saying:  I've got a fruit bowl with appels in it, now I put some pears in it an get rid of the appels........
 
 
I tried to decouple every single R-Core and PSU since EMI/RFI can loop back thru PSU and interfere with the other psu's.
The psu's by themselves have EMI/RFI filters, the addition of the EMI/RFI filters before the R-Cores will also act as a barrier
for EMI/RFI to travel back to other R-Cores and psu's.
 
If using only 2 isolation transformers, one for Digital and one for Analog, it wouldn't decouple the Digital and Analog psu's from eachother.
 
 
Regards,
 
 
Alex

 

[ccschua]

is there a room for concerns with dynamics and resolution with the additional inductors and capacitors networks ?

 

[abartels]

  is there a room for concerns with dynamics and resolution with the additional inductors and capacitors networks ?

 
No concerns, it sounds Heavenly, not to say it seems as if it's Alien, thát good it is,,,,,,
 
 
Not talking about soundstage or tonal balance or dynamics or deep tight lows or anything like that anymore, those words and expressions don't count anymore....

 

[ccschua]

that is a super power supply. again its the highest quality and neat workmanship on display.

 

[abartels]

  that is a super power supply. again its the highest quality and neat workmanship on display.

 
Thank you for your kindest comments 

 
Btw, I am planning to "go commercial" with this design since it surpasses all expectations I had 

It will be designed "as is", USB ONLY, standard version 230V, can be manufactured for 115V market too, not switchable between 230V and 115V though.
Not sure about it's weight, it supposedly weighs about 15Kg 

 
For the ones who are interested, send me PM.
 
Btw. Member Prot wil probably the first Head-Fi member who will have the opportunity to listen to it during the carnaval holidays when visiting him 

 
 
Regards,
 
Alex

 

[prot]

Getti

Thank you for your kindest comments :bigsmile_face:

Btw, I am planning to "go commercial" with this design since it surpasses all expectations I had :wink_face:
It will be designed "as is", USB ONLY, standard version 230V, can be manufactured for 115V market too, not switchable between 230V and 115V though.
Not sure about it's weight, it supposedly weighs about 15Kg :blink:

For the ones who are interested, send me PM.

Btw. Member Prot wil probably the first Head-Fi member who will have the opportunity to listen to it during the carnaval holidays when visiting him 


Regards,

Alex

Getting ready

 

[abartels]

Getti
Getting ready

 
Putting the beers cold already? 

 

[m0reilly]

   
Btw, I am planning to "go commercial" with this design since it surpasses all expectations I had 

yes!!! perhaps also a 'kit'?
It will be designed "as is", USB ONLY...
no i2s in???
Not sure about it's weight, it supposedly weighs about 15Kg 

meh. rather have the goods than a skinny box