> IOW, the primary of the isolation transformer is grounded by the PC.
> The secondary of the isolation transformer is grounded to a different point
> by the amplifier.

This I understand! I guess I will have to get some cables and keep the
signals and returns separate after the transformers. Thanks for the
assistance and the explanation, I am enlightened (think 10W bulbs
here:))

BTW a test with the headphones rendered NO noise at all, I think this
device will fix it!
--
Anthony Toft <toftat@cowshed.8m.com>

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