Did you check those dubious chips?
In the long tda1541a thread, I do not remember where, John from ECDESIGNS gave different value of the DEM decoupling caps in relation to the frequency of the standalone DEM clocking cap.
I will read the paper of Rogic that is making more sense imho. Stay between 470 to 580 pF for the DEM clocking cap and 0.1 to 0.2 uF (you won't notice the difference) for the 14 DEM decoupling caps. Preferabilly if you design a board for friends : make the inductance the lowest : short smd caps, one side of the cap near the pin or rigth on them, last side of the cap rigth to the analog ground, use vias if needed. Try the last acrylic from Panasonic. And a good one for the DEM clocking : silver smd Mica or non metalized MK (FKp2, the Wima ones with yellow bottom) or radial styren from LCR on Farnell. So short caps, not huge ones
I will read the paper of Rogic that is making more sense imho. Stay between 470 to 580 pF for the DEM clocking cap and 0.1 to 0.2 uF (you won't notice the difference) for the 14 DEM decoupling caps. Preferabilly if you design a board for friends : make the inductance the lowest : short smd caps, one side of the cap near the pin or rigth on them, last side of the cap rigth to the analog ground, use vias if needed. Try the last acrylic from Panasonic. And a good one for the DEM clocking : silver smd Mica or non metalized MK (FKp2, the Wima ones with yellow bottom) or radial styren from LCR on Farnell. So short caps, not huge ones
Yeah, the resistance is 0 between +5VD and GND 😢@Vavilen When you measure resistance between +5VD and GND on DAC pcb, is there short or not?
What is the regulator name? Is that adjustable version or fixed?
The regulator is this one: https://nl.mouser.com/ProductDetail/584-LT1963AET#06PBF
Thanks Miro!This regulator has internal protection against overload. Is not the fuse in powersupply broken? Or is the voltage between these 2 pins?
Next task will be to find the short on +5VD on DAC pcb
Phew, it's a fuse!
Where would you go first to trace the shortage on DAC pcb? Or just randomly checking between two points related to the +5VD?
Thanks!
The sounds is perfect and I really liked it. I listened to different types of music by using SparkoS SS3601, Burson V6 Vivid and LM6171. I'm very satisfied with what has been achieved. MagicPerfect, congrats
In my personal opinion the PCM63 project is better and has potential for further improvements. I'm preparing the next project TDA1541A.
So pulling parts from my stash, I have a combo platter of TH PP film capacitors to use in these values:The value of capacitors in audio is never enough LOOOL
Use my values Vunce 😉
0.1uF C40-42
0.3uF C43, 44
1.0uF C45
2.2uF C46
C15 (Cosc) = FKP2 680pF
The only 220nF caps in my stock are MKS (polyester)
