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weird nylon(?) cable in cellphone cable

Discussion in 'General Electronics' started by Marco Scoffier, May 15, 2004.

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  1. I have an earpiece and microphone for a cell phone which I don't use.
    I want to replace the triple 3.5mm jack connector with two RCA
    connectors, so I can plug it into my soundcard and use it with my voip
    softphone. When I cut the cable I was surprised by the weird wires inside.

    I looks like thin nylon(?) strands and is not conductive or has
    some kind of coating which makes the strands non-conductive lengthwise.
    I can't get conductivity on the end of the wire, perhaps it is too thin to
    make a good contact with my meter. I can't solder the stuff either.

    I tried rubbing lengthwise with a razor blade to remove any protective
    coating, but this removed anything that had the appearance of being
    metallic, leaving only thin white non-conductive threads.

    Does anyone know what this stuff is?
    Is there a way of making an electric connection to it?


  2. It is an alloy to which solder will not whet, wrapped around nylon. If you
    look closeley at the original connection you will see that it was crimped or
    welded (the actual conductor was melted to the connector using high
    frequency spot welding techniques, as opposed to just brazing or soldering)
    They use it because it doesn't break as easily as copper does when you flex
    it repeatedly. Almost all audio equipment uses it. What it means to you
    is, once it's broken, throw it out and get a new one because you don't have
    the technology to fix it.
  3. thanks for the info,
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