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In Reply to: RE: USB isolation hub (Gordon, audioengr, John - input wanted) posted by Gordon Rankin on February 22, 2008 at 08:39:51
Opticis is very effective and I like it a lot. Please power it with battery. If you are using some battery pack with universal voltage output, please make sure that it is linear regulated DC output. I read one post here with negative feedback using Opticis. He uses a universal voltage battery pack. I suspect the DC-DC converter is switch mode converter for high energy efficiency which is very noisy.