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RE: Anti EMI tape from AliExpress

Posted by CG (A) on December 17, 2022 at 13:40:55

In Reply to: Anti EMI tape from AliExpress posted by KanedaK on December 11, 2022 at 23:17:14:

Since you were so generous in sharing your discoveries around TKD pots, I'll try to return the favor...

This tape is cloth that is plated with a combination of copper and nickel. The adhesive is conductive, too. So, for RF shielding, it probably does add a certain level of shielding improvement, especially at the seams of existing shielding. I've used something like it with good success for RF projects at work. You often find rolls and rolls of this at facilities where EMI/RFI emissions are tested. When a product doesn't pass the test, any solution is fair game.

As for around the AC plugs, the electromagnetic permeability effects of the nickel probably will alter the common mode current signal transmission through the AC mains connection. Some, but probably not a lot. Certainly very little compared to a competently designed and executed proper AC mains filter. The good AC filters not only provide attenuation of differential mode signals above the mains frequency (50 or 60 Hz) but also attenuate common mode signals, too. The latter are certainly not your friend.

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