I will only add that isolation transformers typically work as well or better than many of the highly touted power line filters that are out there. Just make sure that you get one that is rated for more power than you'll ever want to pull out of it. As with most electrical devices, an "old school" iron core transformer will work better than one that uses a "high tech" but lower performing toroidal ( donut with wires wrapped around it ) transformer. Sean
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