How to shield an HDMI cable

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You can provide additional shielding for an HDMI cable by wrapping it with aluminium tape. The aluminium in the tape acts as an additional shielding layer similar to the internal foil layers. However, double- and triple-shielded HDMI cables can be purchased at a cost comparable to the aluminium tape, which makes the practice economically inefficient. HDMI cables typically include two layers of shielding -- foil and braid -- designed to block high- and low-frequency interference.

Unplug the HDMI cable from any connected devices and place it on a flat surface.

Wrap the aluminium tape around the circumference of the HDMI cable at the edge of the wire parallel to the connector. Leave the connector element exposed.

Continue to wrap the tape around the wire section of the HDMI cable so that the entire cable is covered while overlapping the tape as little as possible. Circle around the circumference of the wire at approximately a 30- to 45-degree angle, depending on the width of the aluminium tape.

Wrap a single layer of aluminium tape around the edge of the wire section so the edge of the tape is parallel and against the connector section.

Cut the end of the aluminium tape with a pair of scissors. Wrap the excess tape around the wire so it lays flat.

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