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Converting balanced audio output for an unbalanced input 5m away

Discussion in 'Electronic Basics' started by h, Feb 4, 2005.

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  1. h

    h Guest


    We have a VT deck with balanced outputs (on XLRs) for audio. Thanks to help
    from this NG I managed to build a simple volume control so we can leave our
    powered monitor speakers (out of reach on wall-mounts) at max and control
    the input from the desktop. I'm now trying to build some more functionality
    into the same box.

    I need to be able to feed a VHS deck which takes balanced inputs via a
    Scart. I've found a couple of circuit diagrams on Jensen's website ( at ) but they require audio
    transformers I can't seem to find in the UK - can anyone suggest a circuit
    diagram that'll do the job with parts I can get from (say) Maplin in the UK?

    Plus a quick question if I may - the writer of the article says that it's
    best to stick the balanced -> unbalanced converter at the unbalanced end of
    the cable because of capacitance on the line - while I understand it makes
    sense to keep the line balanced for as much of the signal path as possible
    (common sense), is there anything I can do to minimise the capacitance
    effect mentioned? The signal, once unbalanced, has to go down around 5
    metres of unbalanced shielded cable before it reaches the VHS machine.

    Any thoughts appreciated.

  2. tempus fugit

    tempus fugit Guest

    I assume that you meant the VHS deck takes UNbalanced inputs.
    Have you checked

    They may have something to help you.
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