Oooo... Hi:
I have been modified this funny unit for few years ago... Actrally it id the very good staff....
I changed all of the resistor to the Holco and using the panasonic FC grade at the powersupply. Ofcoz you can use the OScon at the digital part....
Then I took out the PCB of the DITB and gave it the new bigger case, it made me easy to add on the other optional staff on this... I bulid the shunt regulator for the opamp use... And the opamp I made the convertsion board which like the LCaudio AD825 module but I made this in the DIP package...
The DITB should be using the OP275. I tired the following OPamps on this: LT1058, LT1028, AD797, AD811, HA5112.... Found that the AD797 provide the very musical and warm sound. LT opamps provide the very good sound staff and full range balance....
Ofcoz I seperate the powersupply for the Analog and the Digital... Becoz Analog part I using the Shunt regulator...
You know what it is my first project on modify DAC.... I did it at about 5yrs ago.... it makes me know more on the digital circuit...
