Thanks ! I think my tripp-lite isolator is EI core so it the first thing AC mains go to, hopefully filtering out most of the noise. Then followed by few Schaffner AC filter cables. I am thinking of a DC blocker as I do have a toroidal transformer downstream. But I got a regenerator instead (not arriving yet). When the time comes to experiment with Bybee, I will PM you to ask you exactly how to put them (I am not electric savy), if u don't mind!I use the small Gold purifiers right after the bridge rectifiers at the top of the transformer board in the R8HE. Need one for the + and -/Gnd for maximum performance. I found in line with the clock supply opens the soundstage by 25%. If you put them on the analog supplies (2 purifiers/channel) an obvious grain will be eliminated.
It's peculiar how the composite audio experience has so many distortions added together that until one gets eliminated, you wouldn't have known it was there.
Regarding torroids, as I understand them, while they don't radiate, they do let the most noise go right through them. I don't speak from first hand measurements but EI core provide best S/N. I have 11 of them in my room and there have been times where at the beginning, it felt like the whole room was resonating. I put them in a chassis which may attenuate some mechanical noise...
I built separate oversized DC blockers [to handle very high current draw from the Krells] with very high quality parts [mundorf electrolytics, 100A bridge rectifiers, aluminum chassis, gold fuses] but [I suspect] the 1.4V of maximum DC blockage [Kingwa mentions 1.2V] was not enough in my case. I would have had to double the chassis size and parts count to double the blockage to up to 2.8Vdc. So I decided that I didn't want the real estate, expense, or the time for rebuild to try it out. I moved my refridgerator and a few other things in the breaker panel to the other phase under the assumption that the DC offset is caused by much more current being supplied by one phase. It still hums but not to the offensive degree that I started out with. I don't have an oscilliscope to see what's occuring on the line and as J&K Audio asserts, measuring the DC on the line is difficult.
I'm still waiting on 12 more small gold purifiers. I found you can negotiate the price and like cables, these are probably very high margin parts. Once you try them you never want to go back. The silver purifiers are good but if you're going to do it use the Gold. I'm looking to apply them on all my analog power supplies after the rectifiers. With that in mind, I assert that if you start with the clock feed, you will be delighted as it opens up the holography by 25% like upgrading to a much better clock. I hope this helps....
Is there a way to block out noise coming from the fridge by putting some sort of filter/blocker (though I am not sure if mine is AC or DC fridge) at the fridge ?