My Ebay AK4396 Dac up and running

[colin.hepburn]

Hi All
Well have added a different buffer to the EBay AK4396 Dac
Have built this Sold state discrete buffer with Jfets using it with my EBay AK4396 Dac
As advised here I took the single off the 4.7uf cap and replaced the 1uf cap with a 100k resistor to ground see moded schematic I also set the Source leg of the J2 FET which is a j310 too 270R as the Start point as recommended
It seems recommended to adjusting the trimmer for 6mA as this is suggested to be the sweet spot for this buffer? But for the moment the trimmer pot is left at the start point 270R and it sounds very good running in to the Nad Preamp and the JE Labs EL34/5881 the NAD pre is also a FET input stage a 2SK369
I will need to check the voltage across the trimmer on the J310 to get the current but not sure of the spec for the J310 FET as cant find the data sheet any advice on the current limits on the J310 would be a help if anyone has the spec sheet


Note the High-Tech Bread Board

[colin.hepburn]

Well not a lot of interest in this Buffer them
I was running the buffer @8mA 2.29v/273=0.008
I have now backed off the current to about 6mA 2.45v/373R= 0.006mA
Also would there be any benefit in adding a 100/220uf with 0.1uf bypass caps on the power +/-rails of the buffer
J310 DataSheet

[colin.hepburn]

Hi all
Well so far this pedja Rogic Buffer is sounding very good on the end of the EBay AK4396 Dac inputted to a Pioneer SA-500A pre-amp into a Pioneer SA6200 power amp used as my PC Headphone system with a pair of sennihizer HD650 Cans it makes a killer headphone system indeed

However I have come across the same buffer circuit but using a 6922 valve I would welcome anyone views on this valve circuit version would it work or is it just another wrong internet posted idea as many seen to be see schematic

[carlmart]

Are you still using the Pedja buffer with the DAC or found something better?

[colin.hepburn]

Originally Posted by carlmart

Are you still using the Pedja buffer with the DAC or found something better?

Hi Carlos
Yes I am still using the Pedja buffer as seen in the above Schematic. with that same AK4396 Dac. and it still sitting on that same bit of cardboard I am looking at rebuilding it on to a new PCB and into case AS it, sounds very good and I may also add some decupling caps to supply lines on the new PCB as well