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6400 .. 1/8 Mic connector only?

Dave Dave
Dave Dave Member ✭✭
edited March 2020 in FLEX-6000 Signature Series
Is this right,  the new radios only have 1 mic connector and its a 1/8 inch connector?


  • Clay N9IO
    Clay N9IO Member ✭✭
    edited August 2019
    Correct, only thing I have ever used with my HC4 Heil cartridge.

    A couple of my friends are XLR users, easy to adapt.
    I am sure flex will have an adapter ready soon.
    I found one quickly at a vendor I use at work

  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited August 2019
    Yes, electrically it is an XLR connection. People are thinking a right angle plug is best in order to take the wight off the plug.

    And check out the post, microphone connection on the 6600 down the board
  • Mike W9OJ
    Mike W9OJ Member ✭✭
    edited May 2017
    That adapter converts balanced mic to unbalanced input and also contains a transformer to step 600 Ohm mic to 2500 Ohm input.

  • K3SF
    K3SF Member ✭✭✭
    edited March 2020
    For the new 6400/6600, what happens when you plug Heil headset which has 1/8" mono plug  for the mic output in to the 6400/6600 mic input??    Also, what type of adapter will be needed for this situation?

  • Clay N9IO
    Clay N9IO Member ✭✭
    edited August 2019
    Yep you're right Mike.  I got the 600 ohm 1/8" part right.
    Like i said, not an XLR user but I'm sure the proper adapter for the mic of your choice is available.

    I too will be adapting the 1/8" as Bill said to keep the strain off the connector in the radio.
  • Dave Dave
    Dave Dave Member ✭✭
    edited May 2017
    Everyone missed what I see as a problem, a 1/8 connector should never be used on something that gets pulled, its simply too weak. A L connector that barely sticks out might last a while.

    I can only assume Flex saved .03 a radio by using it but with flex still not having something so BASIC as Squelch I cant say I'm surprised.
  • Clay N9IO
    Clay N9IO Member ✭✭
    edited August 2019
    Here is a link posted a little while ago for a right angle 1/8" to XLR.

    The post is
    I like Ken NM9P's comment, makes most sense.
  • James Whiteway
    edited August 2019
    Here's a very informative read on the subject of audio connectors (XLR, TRS and others) and their
    proper use to avoid ground loops.

    Since the rear connector on the new radios is a "pseudo balanced" connector, it might be a good idea for all of us that are considering purchasing the new radios and wanting to continue to use our current microphones ( I have a Heil PRO 781) to read this article.
  • Clay N9IO
    Clay N9IO Member ✭✭
    edited May 2017
    James that is the best illustration I have ever seen on the subject.
    This is a must read.  Thanks.
  • Clay N9IO
    Clay N9IO Member ✭✭
    edited May 2017
    Right angle definitely the way to go Bill.
    Also, see the URL link in @James Whiteway's comment below.
  • Michael Coslo
    Michael Coslo Member ✭✭
    edited May 2017
    I would prefer a 1/4 inch over 1/8th inch, but remember there is always some compromise. The mic I have plugged in right now is 1/8th inch. So I have to use an adapter. So I'm using pigtails and adapters because my microphones aren't all the same. 

    As for the squelch, I'm surprised that anyone uses them. I only use them on my FM HT's and Car radio.  Even Icom uses a combo squelch RF gain knob that most of us switch to be RF gain only. But different strokes for different folks. 

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