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Home Forums Products Stompboxes lots of noise / hum from my new H9 Reply To: lots of noise / hum from my new H9

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Michelle911
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I just tested my power supply by putting probes on the ground sheilds and apparently what’s sold as an isolated power supply isn’t really isolated so much in the way that matters…  well, I was about to  upgrade it anyhow, I guess now might be a good time to do that.