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Senheiser PC3 Headset on a 6400M

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HB9DDS
HB9DDS Member ✭✭
edited February 25 in Peripherals & Station Integration

Hi Folks

I have a 6400M and a Sennheiser PC3 headset.

Bildschirmfoto 2026-02-25 um 14.43.53.jpg

I use it with all my transceivers (not the Flex). An adapter supplies the headset with 8V.

The 6400M has a separate microphone input. The original FHM-2 microphone has a 3-pin connector.

Bildschirmfoto 2026-02-25 um 14.35.30.jpg

In the menu, I can enable the bias. I thought this would supply voltage to the microphone jack, allowing me to use a headset with an electret capsule. But it doesn't work.

Am I misunderstanding something?

Daniel

HB9DDS

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Answers

  • Ha Gei
    Ha Gei Member ✭✭✭
    Options

    No.. it should work.. i use the same headset , but not locally on the 6400.. but we had a similar one and bias was okay there.

  • HB9DDS
    HB9DDS Member ✭✭
    Options

    it should … but it doesn't working here……

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin
    Options

    Check the headset and see if the MIC connections are TIP and Sleeve or Ring and Sleeve. It makes a difference.

  • HB9DDS
    HB9DDS Member ✭✭
    Options

    Mike

    Well, Ha Gei writes that it works for him with the same headset. That means the PIN assignment should be correct...

    Daniel

    HB9DDS

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin
    Options

    You would think. There have been comments previously in the community that others have determined that there have been variances.

    My Koss SB400 will NOT work on my 6600M without an adapter that I bought on Amazon. I’m not at home, but I think it was a Mono to Stereo adapter that removed the Ring from the circuit.

  • HB9DDS
    HB9DDS Member ✭✭
    Options

    A Stereo to Mono Adapter was the solution.

    stereo-mono-adapter-1.jpg

    Daniel

    HB9DDS

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