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    Spark Hum solution - Europe - all about grounding

    Spark
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    • jonebee59
      jonebee59 last edited by jonebee59

      Hum seems to be because power supply is not grounded to earth. I created a separate plug with only an earth wire and connected to USB cable connected into Spark (the outer part of the USB plug that normall goes into a computer) - crystal clear now. Same effect as plugging USB Cable in computer that has grounded power supply

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