Allo Digione

[chauphuong]

On 12/25/2017 at 5:42 PM, allo.com said:

In my opinion DigiOne will not benefit greatly from a ultra low noise PSU.

 

   If you want to try you could try removing the isolated DC/DC convertor and use 2 PSUs to feed the RPI and DigiOne

Could you please show how to use a separate PSU to feed DigiOne? I have a LT 1083, and also a 7V Rcore at hand but just don't know what to remove and where to solder on DigiOne.

[chauphuong]

Thanks but I will do the modification sooner or later (still looking a suitable case). By the way,  I have used a rcore transformer with a LT1963 then to 3 LT 3045s that provide 5v,  3.3 v,  and 1.8 v power directly to Pi bypassing the switching dc-dc converter on Pi. The result is quite impressive,  a lot better than iPower. Also have plugged the DigiOne into Pi (DigiOne is still powered by Pi) to compare with a Pi + Singxer SU1(modded) combo. Alias , Singxer SU1 beats DigiOne hands down.  Hence the intention to do further with externally powering DigiOne. Anyhow,  DigiOne is not Berkeley Alpha price wise so why not messing up a little bit. 

[chauphuong]

I was surprised too.......  . 

3 hours ago, steklo said:

I'm really surprised to read, that a modded Singxer SU-1 fed by the poor USB output of RPi is better than RPi/Digione. Please let us know the results with Digione being fed externally!

 

[chauphuong]

My finished product....

[chauphuong]

3 hours ago, nbpf said:

Nice! How is the DigiOne powered here? How does it sound in comparison with a standard setup? Do you still find that a Singxer SU1 attached to a Raspberry Pi yields a better sound quality? Thanks, nbpf

Hi, the 30VA Rcore transformer has 2 outputs. Output 1 powers Pi3 through Lt1963 and 3 Lt3045s. Output 2 powers DigiOne through Lt1083 (center of the photo, with the big capacitor). I just followed instructions in the file attached by Allo last page.

[chauphuong]

I think it is already better than Pi+ SU1 with the power mod. Highly recommended.

[chauphuong]

Pi linear 3x. Digione. Digione with separate power. 3 steps in better SQ.

[chauphuong]

Pi3x means a rcore transformer providing 5v, 3.3v, and 1.8 power to Pi, bypassing the smps dc converter on Pi (it is removed indeed). This way ensures Pi is fed by full linear power. This helps boost SQ. Adding a DigiOne is another move for better SQ. And finally, modding power source for DigiOne consummate the effort.