Isolation transformer -low cost power conditioner?

Thanks for the help.

Look at the Richard Grey. This is pretty much what it is. A big choke.

Here is a very affordable isolation transformer that provides balanced power:

The Transcendent Balanced Power Supply

Other affordable power conditioners would be the Running Springs Haley, Blue Circle Music Rings, Balanced Power Technologies (BPT) transformers.

Good luck,

Rene