04-01-2025, 11:14 AM
Hi 
I have enjoyed my protodac for over one and a half year now. No issues. Decided to build my third project together with a c3850 clone front and. The prototype was a success, but l’ve stumbled upon a problem in my attempt to build it in an old NAD cabinet. The main difference between the prototype and this build is the signal output. I’ve direct wired L/R channel in front of the 5v input instead of using rca jacks. I now struggle with a lot of noise in the left channel. I’ve tried to different boats, the noise is still there, like the left channel is not properly grounded???!! No difference with or without power to the board. Tried to disconnect the output cap., but the noise increased dramatically…. No issues in the right channel…
Picture with the cap disconnected:
I have enjoyed my protodac for over one and a half year now. No issues. Decided to build my third project together with a c3850 clone front and. The prototype was a success, but l’ve stumbled upon a problem in my attempt to build it in an old NAD cabinet. The main difference between the prototype and this build is the signal output. I’ve direct wired L/R channel in front of the 5v input instead of using rca jacks. I now struggle with a lot of noise in the left channel. I’ve tried to different boats, the noise is still there, like the left channel is not properly grounded???!! No difference with or without power to the board. Tried to disconnect the output cap., but the noise increased dramatically…. No issues in the right channel…
Picture with the cap disconnected:
ProtoDAC, rpi4+, Decware se84+, klipsch rp600, Dynaudio xeo3,
crown xls1502, B&W dm16,
crown xls1502, B&W dm16,
