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XLR cable outputs for 8400M and Heil microphone

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ab7i
ab7i Member ✭✭
in FLEX-8000 Signature Series

Good Morning. I have an 8400M that works fine with the hand mic but I want to use the Heil 781 microphone with the radio. I have confirmed that the microphone works and I have xlr cables that terminate in the proper plug for the mic. I can not get the microphone to work. I know this is a simple task but it is giving me fits. I have the proper setting in the radio and have tried everything. I got the cables from amazon, so maybe that's my problem.

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  • Neil D Friedman N3DF
    Neil D Friedman N3DF Member ✭✭✭✭
    Options

    My 781 works great with my 6600M, but I use the balanced audio input that does not exist on the 8400M.

  • David Decoons, wo2x
    David Decoons, wo2x Member, Super Elmer Moderator
    Options

    Check out custom cables from W2IHY

    https://w2ihy.com/product/custom-cable/

  • Ken Wells
    Ken Wells Community Manager admin
    edited February 2025
    Options

    1) Be sure that the mic cable is a truly balanced XLR to 1/8 inch TRS cable. Many of those sold online are not balanced and are wired to use a XLR Balanced mic on a computer's unbalanced input, or they combine the TIP and RING and send them to the Pin 2 of the XLR plug.

    Your cable should be wired like this:

    XLR > > > > > TRS

    Pin 1 > > > > SLEEVE/GROUND
    Pin 2 > > > > TIP
    Pin 3 > > > > RING

    Here is one that would work:

    Amazon.com: CableCreation 3.5mm (1/8 Inch) Stereo Male to XLR Female Cable, 6 Feet/Black : Electronics

    2) Please refer to this document for adjusting your mic settings.

    Adjusting your Microphone Settings for Best TX Audio – FlexRadio

  • ab7i
    ab7i Member ✭✭
    Options

    Thank you Ken, yes I had a trs plug and wired as you pointed out and it works….Thanks so much to the community

  • capiwal
    capiwal Member ✭
    Options
    Hi Nell,

    I also got myself an XLR microphone. It works with the Flex-6700, but I can't seem to configure it as the default microphone. How did you set it up? I must be doing something wrong. Could you please send me step-by-step instructions? I'm using the Maestro B with hardware version v4.1.3.39644. Unfortunately, I can't seem to save the settings via the Maestro. 73 de Carsten, DO5CA

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