Easy free tweak -- dealing with RFI/EMI -- try it and see?


With some Ciamara credit available I thought I'd try the Stillpoints ERS paper on the insides of my fuse box and Torus wall transformer to see if it helped improve things in my system. Treating fuse cabinets is a fairly well known application of this product which is designed to absorb stray RF and other electronic nasties

Well here I was tweaking away and I thought, golly the system sounds really clean and open and I haven't put the paper in yet -- I assume it will be even better with it!

Imagine my surprise to discover I'd been listening to the system with the fuse box/panelboard cover open! Turns out one of the best things to do with EMI and RFI may not be to enclose it in a metal box in the first place 🤓

And actually with it closed, with or without the ERS paper it sounded much more closed in, with a loss of low level detail

Same went for the door on my Torus transformer -- from now on I'll leave it open for serious listening -- there is a bit more audible transformer hum but as it's in another room this is no big deal

Anyway this is a dead easy free tweak so give it a try -- you may like the results
128x128folkfreak

Showing 3 responses by geoffkait

RF is insidious, pernicious and toxic and permeates almost everything. Even though as we now know, it’s really photons, but photons that can travel through solid objects. RF gets into the local house wiring via any number of paths, including, but limited to, through unused power cord plug prong holes in the listening room and every room of the house. Not to mention the ubiquitous microchips in modern electronics like CD players generate gobs of RF. All local cell phone towers, satellite TV, microwave towers, microwave ovens, TVs, air purifiers, etc. generate boatloads of RF. RF is like Chickenman (he’s EVERYWHERE!).
For the same reason all transformers, especially those big honking output transformers, should be wrapped with low frequency high permeability mu metal. For very best results wrap the transformer twice leaving a 1/4" space between the sheets. As for the ERS stuff I’d be very careful with it while experimenting. Listen for the sound becoming wooly or weird sounding. Wooly, bully. I recall distinctly hearing the ERS paper hurt the sound when a sheet of it was sitting on a coffee table in the listening room. I also heard it hurt the sound when it was moved to another room. I'm not hot doggin' ya.
Bingo! The magnetic field produced by the door is bad news. It's got nothing to do with RFI/EMI.