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Headphone adaptor

Lee Member ✭✭
edited January 2018 in FLEX-6000 Signature Series
Trying to connect a Yamaha CM500 to my Flex 6300 . I have had a Heil Pro 7 connected to my Flex 6300 with no problem. Now with the CM500 Audio is working fine but I have no transmit output .


  • Frank Rode
    Frank Rode Member
    edited November 2017
    Hi Lee. I think you are using the headphone at pc's sound card. Audio source set to pc. With ptt I had also no output. With pushing the mox button I have output. Think that'should the issue you have 73 Frank
  • Mike
    Mike Member
    edited November 2017
    Turn on the mic bias voltage in the settings menu.
  • ctate243
    ctate243 Amateur radio contester Member ✭✭
    edited November 2017
    2 things if connecting directly to the flex, particularly if you are using the heil adapter in the front of the radio. 

    DC bias ON
    Stereo to mono connector on the mic connector

    I use a CM500 frequently and this was how I was able to get it working.
  • K9DUR
    K9DUR Member ✭✭
    edited November 2017
    N6WM has it right. The CM500 has a stereo plug with the mic element wired to both tip & ring. The Heil adapter has a mono jack. When you plug the headset mic into the adapter you short out the mic element. Stereo-to-mono adapters are dirt cheap on E-Bay. — 73, Ray, K9DUR

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