Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
The latest SmartSDR Software:
SmartSDR v4.2.20 | SmartSDR v4.2.20 Release Notes
SmartSDR v3.10.15 | SmartSDR v3.10.15 Release Notes

The latest 4O3A Genius Product Software:
The latest 4O3A Genius Product Software and Firmware
How to Receive Technical Support::
If you are needing assistance with FlexRadio products, please refer to the product documentation or check the Help Center for known solutions. Need technical support from FlexRadio? It's as simple as creating a HelpDesk ticket.

what are the pin outs for the 3.5mm mic jack on the 8400

Options
k4em
k4em Member, Unconfirmed ✭✭
in FLEX-8000 Signature Series
The FHM-3 works fine with the 8400. But my Koss 45 does not work. I created a mic profile with Bias on I see no audio on meter at all. I tried adding the mic preamp to profile, nothing. The SB45 and another boom/mic works fine in my PC and Icom 7300 with an 8 pin adapter. I need the pinouts for the 8400 mic connector so I can make an adapter. Thanks Dave

Answers

  • Geoff AB6BT
    Geoff AB6BT Member ✭✭✭
    Options
    image.png
  • DON
    DON Member ✭✭
    Options

    Here is an adapter I made to connect a cheap logitech computer headset to the mic in jack on the 8400. This should work for almost any headset that uses an electret mic (CM500, SB45, and most of the other electret equipped headsets. I found this drawing on one of the other discussion groups, tried it, and found that it worked. The value of the cap is not critical.

    Flex8400-computer-headset adapter.jpg
  • k4em
    k4em Member, Unconfirmed ✭✭
    Options
    I have a Koss SB45 with electret element and it does not work plugged into the 3.5mm Mic jack on my 8400. I made an adapter following the above diagram, except I did not connect Flex Ring Mic (-) to GND. Since the 8400 ground's mic (-) in the radio. I used a 1uf Tantalum with 'positive' going towards the Flex TIP. I've made about 20 qso's so far and excellent audio reports and no RF on signal. I did not turn on the mic preamp just the Bias, I have plenty of audio without the preamp.
    Dave k4em
  • TSMyers
    TSMyers Member ✭✭
    Options
    I am surprised someone hasn't jumped on this and started making these adapters, I am not sure I trust my old eyes to solder small wires. I am also surprised Flex hasn't stated sourcing these, there are so many quality gaming headsets out there for <$50 that would work with this adapter.

Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.

Comment As ...

Categories