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Anti EMI tape from AliExpress

178.51.173.10
Posted on December 11, 2022 at 23:17:14
KanedaK
Audiophile

Posts: 2519
Location: Brussels
Joined: April 27, 2010
 Found some positive returns on head-fi about this tape, apparently effective (around the body of AC plugs for example) I'm going to try it, it's very cheap!

 

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RE: Anti EMI tape from AliExpress, posted on December 12, 2022 at 18:30:16
ABliss
Audiophile

Posts: 1482
Joined: March 16, 2001
Contributor
  Since: August 3, 2002
 Duct tape probably just as good, or foil paper .

 

RE: Anti EMI tape from AliExpress, posted on December 14, 2022 at 20:44:23
13th Duke of Wymbourne
Audiophile

Posts: 2800
Location: Orange Co., Ca
Joined: September 19, 2001
 Maybe the copper foil tape will be more effective. Do not expect much, or any, magnetic shielding but it could help RF shielding if you ground it well.

 

RE: Anti EMI tape from AliExpress, posted on December 17, 2022 at 13:40:55
CG
Audiophile

Posts: 432
Joined: October 11, 2000
 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.

 

House wiring isn't sheilded, so what would the point be?. NT, posted on December 22, 2022 at 12:21:37
Coner
Audiophile

Posts: 3703
Location: S.W. Washington state, USA
Joined: November 17, 2001
 nt

 

RE: Anti EMI tape from AliExpress, posted on January 16, 2023 at 16:16:32
Tuckers
Manufacturer

Posts: 2004
Location: San Francisco
Joined: September 29, 2001
 My Opinion:

There is EME (electromagnetic energy) generated by the cable itself. In some designs the cable is shielded and connected to ground at the entry plug. This theoretically drains the extraneous energy being produced by the cable itself and also from any outside EMI that it encounters.

Foil like this is reflective, not absorptive. Each connection to the plug and between the metals in the plug (whether soldered or clamped) also generate more EME. When you wrap the plug in shielding, unless it is grounded, it will simply reflect that EME (now EMI) back into the line. It may also repel outside EMI, but the amount internally is likely greater.

Will you hear a difference? Probably. But is it reducing EMI in your circuit? Probably not.

 

3M RFI tape for microchips, posted on August 6, 2023 at 05:17:35
geoffkait
 The 3M tape can be cut into small squares or rectangles and applied to the top surface of any and all microchips in the electronics, you can make a tent from the 3M stuff for the fuse. Care should be taken since the tape is highly conductive.

 

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