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my next question is - do the ground loops only occur through USB connections - what about the power supplies - or are these isolated already by their transformers?
The path I am worried about (from my diagram) is
USB Hub Power --> USB Hub --> 550D --> 550 Power
for the isolators I imagine that if all USB stuff comes off the hub, then a single isolator between netbook and hub should be sufficient - surely I wouldn't need one off each hub port? It also looks like the isolators reduce the USB throughput a little...would this upset anything?
Adam
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