Hi
I have build a reciewer containing a RaspberryPI 3B, a IQAudio PI_DAC+ and a Yuan-Jing (YJ) Blue/Black 2.0 Board( with modufication from this linkhttp://www.diyaudio.com/forums/diyaudio-com-wiki/252663-tpa3116d2-boards.htm).
For PS I use a laptop PS 19V5 output directly to amp. and a UBEC 5V/3A DC-DC converter. for the PI.
It's grounded to the chassis.
I this constellation I have a lot hiss and noise in the loudspeakers.
If I use a USb PS instead of the UBEC, it's gone ...no noise.
Can anyone tell me what is wrong with the UBEC?
I have measured the AC on the 19V5 and it's about 20mVAC and for the UBEC it's about 2mVAC.
Thanks in advance
Bjarne
I have build a reciewer containing a RaspberryPI 3B, a IQAudio PI_DAC+ and a Yuan-Jing (YJ) Blue/Black 2.0 Board( with modufication from this linkhttp://www.diyaudio.com/forums/diyaudio-com-wiki/252663-tpa3116d2-boards.htm).
For PS I use a laptop PS 19V5 output directly to amp. and a UBEC 5V/3A DC-DC converter. for the PI.
It's grounded to the chassis.
I this constellation I have a lot hiss and noise in the loudspeakers.
If I use a USb PS instead of the UBEC, it's gone ...no noise.
Can anyone tell me what is wrong with the UBEC?
I have measured the AC on the 19V5 and it's about 20mVAC and for the UBEC it's about 2mVAC.
Thanks in advance
Bjarne
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I had exactly the same problem on a similar setup.
I was able to fully cure it by using one of these:
https://www.amazon.co.uk/gp/product/B015E4835U/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I was able to fully cure it by using one of these:
https://www.amazon.co.uk/gp/product/B015E4835U/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
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