Digi-Key - 229D12-ND (Manufacturer - 229D12)
Attach is new wiring diagram with the above transformer and combined 5v and 3.3v.
The most recent proposal posted for the UWB setup:
Does the two UWB modules for digital 5V and 3.3V sharing of the GND without any extra parts cause issues?
Or can we take an extra step to protect 5V and 3.3V from each other?
If this is unnecessary, please explain.
(...) its quite a nice improvement. Highly recommend doing this. Even just replacing the two 100uf cap with blackgates was a nice improvement.
Now my aim is to replace the dac's power supply. Im thinking of using salas shunt regs or the discrete shunt regs, as I can use the existing R toroidal. Cant get lars/Newclassd to sell his uwb regs.
I finally broke down and bought a Zhalou 2.5c DAC. No mods other than some opamp rolling. I put in a pair of browndogged OPA602's on the analog board and OPA2107's on the headphone amp since my other headphone amps (PPA2) are in for repairs. The Zhalou headphone amp seems to do better now, but no big change otherwise. The headphone amp has some crazy gain though which is annoying.
The board is chock full of Elna capacitors, and a few Nichicons. Good parts if they're legit. The decoupling caps I believe are 47uf Elna RB2 (shiny blue) bypassed by a 1uf film cap. I've seen other designs use polarized 100uf for the same purpose. I believe the positive side would face the DAC board. I've got all sorts of fancy 100uF's I could swap out there.