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Thread: Redundant shielding

  1. #1
    Constant Bitrate
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    Redundant shielding

    Let me start by admitting my idea is likely overkill, but overkill seems to be a common theme in this community.

    So to prevent undue strain on any connectors, especially a 3.5 mm audio plug, I had to go with a 3.5 mm-to-stereo-rca cable and use female/female couplers to my heavily shielded rca jumpers (original idea was an adapter which the heavy wires might put too much strain on).

    I don't like the thin wires as I'm skeptical of their EMI shielding properties. I want to use aluminum tape to attach an additional ground at the point of the coupler and will likely extend this additional layer of shielding up to the connector at the pc.

    If I connect the aluminum to the exposed metal on the good jumpers and run a ground wire from this shielding to a nearby ground, will this achieve my goal or will it mess something up?

    I'll attach a simple MS Paint sketch in a little bit.

    -Zack
    via Droid Charge

  2. #2
    MySQL Error soundman98's Avatar
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    i really don't think it is worth it, as alum. tape is probably less flexible then any wire i know of.

  3. #3
    Constant Bitrate
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    To go a bit cheaper and to test the theory, I've wrapped it in foil extracted from the coaxial cable my company uses and did a spiral wrap which is covered in duct tape. It seems flexible enough, and I'm not out any expense if the shielding falls apart or proves too cumbersome.

  4. #4
    Raw Wave
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    See if you need it first.

    But thickness does not reflect shielding strength.

    More thickness reduces losses - viz TV coax; RG6 vs RG11.

    But they are for way higher frequencies - audio coax is nowhere near as critical. Usually not even digital audio either - and that requires a 10-fold of audio frequencies (above 200kHz), but that is still way below the 100MHz and above of TV.


    And unlike RG-6 (quad-shield) coax, I doubt that audio would require extra shielding. But be aware of ground loops if you do - ie, maybe only ground the sensing end.



    [ Ramble - and aside, but IMO funny... Having recently gone thru the exercise of RG6 conversion, I was amused to read on various forums that "quad shield RG6 had no less loss than standard cheap (single-shield) coax, hence it's wasted...".
    As if shielding has anything to do with dB losses! Shielding is to shield noise - whether ingress or outgress.
    For coax, dB losses are reduced through larger diameters (eg, RG11 vs RG6) else differing materials (dielectrics) etc.
    I do know to stay clear of forum advise (generally speaking). Bluddy mp3car - if only they catered for TVs!!! Now that's a forum I consult for expertise - excluding certain recent (pair of) threads LOL! ]

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