FT-2900 Mic Connector Pinout?

Discussion in 'General Technical Questions and Answers' started by N4MU, Feb 3, 2018.

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  1. N4MU

    N4MU Ham Member QRZ Page

    Anyone out there have the pinout for a Yaesu FT-2900 microphone/PTT connector? (The RJ14 (11?) one. Thanks. Your reply will prevent my experimenting...LOL
  2. W9GB

    W9GB Ham Member QRZ Page

    Yaesu USA

    Yaesu FT-2900R 75 Watt Heavy-Duty 144 MHz FM Transceiver

    Yaesu FT-2900R FM — Operating Manual
    PAGE 10 - Pictorial of the 6-pin Microphone Jack (Modular)

    The 6-position modular connector (sometimes referenced as 6P6C),
    6-conductors arranged in a single row. This connector is used for voice/data applications:
    telephone (two-line), networking, extended-distance peripherals, some radio microphones.
    Looking at MIC connector on Radio Front (or BACK of the Modular connector, 6P6C)

    1 : PTT/Clone
    2 : MIC Input
    3 : GND
    4 : +8 VDC
    5 : MIC SW1
    6 : MIC SW2
    In the vernacular, used by the technology industry, they are called "RJ" connectors.
    This is technically inaccurate, but the naming convention is widely used.
    “RJ” is an acronym for Registered Jack, which is part of a coding system
    developed in the 1970s by AT&T to classify telephone services and equipment.
    Last edited: Feb 3, 2018
  3. KA9JLM

    KA9JLM Ham Member QRZ Page

  4. N4MU

    N4MU Ham Member QRZ Page

    GB & JLM: Thank you both kindly for doing what I should have done! I look at those files all the time for other Yeaus models but never thought about finding the pinout there. (The radio in question is not mine...it's the clubs so I plead nolo havradio)...it's in the club shack. Duhhh on me...Thanks again!.....Talk about feeling stupid.........
  5. W9GB

    W9GB Ham Member QRZ Page

    The Japanese “Big 3” amateur radio designers (or subcontractors) ...
    have made mistakes with connectors through the past 40+ years.

    A common error is the MIRROR-IMAGE mistake with CONNECTOR Pin-Outs.
    Yaesu has been particularly bad since 1970s (multi-pin power connectors).
    This is WHY the photo showing pin 1 on a 6P6C modular was used (photo above).

    Connector Numbering should always be performed from a Standard Viewpoint.
    Industry Standard: Back of Plug Connector (where cable enters) OR
    Receptacle mounted to Radio equipment (Don’s posted pictorial from Manual).
    KA9JLM likes this.
  6. KA9JLM

    KA9JLM Ham Member QRZ Page

    That could be a real problem on this radio, Because 8 volts would be connected reverse polarity. :eek:
  7. N4MU

    N4MU Ham Member QRZ Page

    Yup! Measure three times...cut once!
  8. KM6LYW

    KM6LYW Ham Member QRZ Page

    reviving this for completeness, but what do you do with pin1? ground it? ground through a resistor? the manual simply says to connect it to the TNC's ptt connector.

    I'm building a tnc and was planning on grounding pin1 through a fet. insert a current limiting resistor at first for safety and see if it triggers ptt?

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