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How do I enable the bias voltage for a microphone using Flex-6500?


I recently bought a used Radio Sport headset that has an EM56 microphone. It requires the bias voltage to be on. How do I enable it?

Andy, k2oo



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

    In SmartSDR for Windows go to Settings/RadioSetup/Phone/CW

    You can enable bias for an electret mic or +2- dB boost if needed.

    Dave wo2x

  • Andrew Thall
    Andrew Thall Member ✭✭

    Thank you!!

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