Copper Sleeve over IEC

Yes briefly (but without listening for any audible changes) and as I said earlier I "measured" the outcome using my home made device (AM radio) that in fact when the copper sleeve is in place it reduces the noise at the terminations.

But my point is that while the copper sleeve reduces this "noise" it may not be negating it - it may only stop it from escaping and that's why I don't hear it...

Maybe my home made tool is inadequate for this exercise?

I'm all for tweaks, especially cheap ones, but if the design or desired outcome of this tweak is to stop "crap" from entering whatever component its being used on I still say the best cord is an insulated cord because if an uninsulated cord picks up anything through the cord itself it could be transmitted along the cord and into the gear and the copper sleeve would not stop this from occurring as far as I can see. If the design is to ensure that no power escapes at the terminations (although I don't know if that's possible or even a negative consequence) then I guess it works as it is quiet for my test as well.

If anyone out there has the proper tool to measure this they should try and do so with an uninsulated cord as well. If you hear noise all along the cord and then its silent at the IEC and with the copper in place it may very well be because the copper blocks you from hearing it but it doesn't prove its "killing" it off.

Maybe I am just missing the point or not expressing myself clearly enough...

Chrissan,
You may mistaken EMI and RFI. While RFI MUST need a ground wire to disepate its energy... like the lightning rod, the MAGNETIC energy /force can be controled by creating barriers, distant, or demagnectized equipments. Hooking up a ground wire to demagnitize the magnet energy is not an effective tool.

RGD,
I totally agree with you. How the copper coupler can take in effect right at the female plug while my whole entire power cord if it isn't shielded and fully exposed?
But I think this tweak makes sense and has a potential to improve sound. Everytime we can control either very much, alot , or just a little of EMI and/or RFI, it is a benefit to perfection the audio sound.
Disregard the fact that many of our power cables are not fully shielded, if this copper coupler tweak actually works in theory, then if I may, I can exagerate it as the power conditioner working concept. Which means it can analize then stablize the un-filtered and un-stabled electricity (current, voltage, and hz) from the main source ( elect. Company). See? All the power lines are not shielded but we, as audiophiles, still working hard to find ways to go around it.
In this hobby, I PERSONALLY admire to ones that continuosly
finding/hunting for ways to maximize their mid-end systems than others who spend $20K to $50K for a pair of speakers and knowing nothing about technicality.
So,like Ozzy's been screaming all week, give it a try!!!

Wonder why none of the cable manufacturers employ this on their cables?

Cyclonicman, I was wondering that too.

Even the big name CD manufactures should be including or have a built in/out copper sleeve.
I know my Cary CD player has a copper base and a copper shroud around the transport, wonder why they they never thought to provide a copper built in/out sleeve.

Perhaps it is because most Audiophiles use there own power cord with the Cary Equipment and the IEC has been a standard item on Audio equipment for years.

So they (Cary Audio and all others) probably did'nt think outside the box. (pun intended)

I'd like to suggest that those with DIY skills, solder the connectors to both ends of your power cords. Often times, the screws will loosen even on high end connectors. The results are audible and I always use solder only connectors on the IEC ends. The plugs I modify, removing all screws and any magnetic material.