Vishay VAR R6 + short 4 wire hopefully will prove best for synergy with your DAC and your subjective preferences.
Yes maybe.
today i replace the jfet with the resistor in this case the stock resistor in two wire mode and after a week of listening to the jfet i prefer the resistor version.
in my subjective listening the main difference to me is the stronger lower bass of the resistor version and i think the sound is bigger and stronger than jfet for that reason. the sound with the resistor seems more airy and natural also.
i have to test with vishay var... and i´m doing new boards with fancy parts mundorf etc.. to see in relation to stock parts if there is difference.. then maybe i ll try jfet again...
is it ok for C1 to use russian teflon 0,1uf?? because they are big and the wires will have bigger size to get to the board...
is it ok or technically it is not good for c1???
Well, the extra inductance of longer component leads is not a good thing but since this is not a design relying in SMD layout for super minimal inductance to have smooth cut off frequency profile, its designed to be relatively relaxed for that, you may try. Anyway the traces already contribute some. If you will perceive sharpness then its a hint you overdone it and there's a resonance peak introduced. Then go back to a smaller component.
I have to check...
Is the vref considered digital ?
Another thing.
Instead of the teflon could i use russian ssg silver mica...
What are your opinion on quality?
With silver mica i think i will be near the pcb because they are not so apart..like teflon
Russian SSG is very good quality and its a nice affordable option to evaluate in your own parts mix.
There is also a smaller Russian Teflon around, the FT-1 200V, that you can find in very cheap lots at 6800pF i.e. 0.0068uF.
Vref is usually some bandgap referenced circuit. So its a voltage steady analog thing for the DAC to use.
There is also a smaller Russian Teflon around, the FT-1 200V, that you can find in very cheap lots at 6800pF i.e. 0.0068uF.
Vref is usually some bandgap referenced circuit. So its a voltage steady analog thing for the DAC to use.
6800pF can work to interesting alternative effect especially if in combination with changing R5 to 2.2 Ohm
Maybe is the transformer because is 7v i think....
I have another with 9v.. i will try.
Thks for the help [emoji3]
Hello Salas,
I tested with 15v transformer and i have the same readings and simptons.
On multimeter i get 6.30 v and the three leds have dim light.
Maybe i have someting else broken lol.