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Kenwood KPG-46 Cable Pinout

Discussion in 'General Technical Questions and Answers' started by ZS1F, Nov 13, 2019.

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  1. ZS1F

    ZS1F Ham Member QRZ Page

    Hi All

    Hope that one of you guys can assist with the correct pin-out for the Kenwood KPG-46 cable on the USB side (wires came loose in transit).

    Thanking You.

    Andre ZS1F

  2. W9GB

    W9GB Ham Member QRZ Page

    USB 1.1 and 2.0 Connectors have a Standard for Cable wiring and Color.
    That does not mean your KPG-46 cable mfg. followed the Standard.

    279225BD-3942-4C84-B5A9-8C44CA620FE8.png E3375D51-63B9-4B5D-AA89-7C16E568C876.png

    Pin 1 : V+ : Power (+5 VDC), RED
    Pin 2 : D- : Data - , WHITE
    Pin 3 : D+ : Data + , GREEN
    Pin 4 : V- : Power Ground (GND), BLACK
    SHELL : Shield/Drain Wire of cable Assemblies/PDF_2/3021005-03.pdf
    Repeater Builders : Kenwood Page
    Kenwood numbers the pins backward from UTP Ethernet standard (TIA/EIA 568)
    Sadly, this has been a common Japanese error (mirror-image) with connectors, since the 1970s.

    The Kenwood KPG-4 and the KPG-46 programming cables are the exact same unit except for the RJ connector on the radio end of the cable.
    The KPG-4 has a 6-pin (RJ-11 / RJ-12-style) connector.
    The earlier KPG-46 has an 8-pin connector (RJ-45 style) and the center 6 pins are wired the same and the outer 2 pins are not used.
    If you are careful the 6-pin KPG-4 will work perfectly in the 8-pin mic jack. The plastic tab should only let you put the 6-pin plug into the middle of the 8-pin jack since pins 1 and 8 on the 8-pin jack aren't used for programming purposes.
    Look carefully at the 6-pin plug however, some have a thicker shoulder that will push pins 1 and 8 of the 8-pin jack up into the plastic body, bending and damaging the two pins.

    If you are going to build your own programming adapter you could copy one trick I saw - the person used a dual jack snap-in housing, mounted the perf-board inside, had a DB-9 pigtail coming out of one side, a connector for a 12vDC wall wart on the same side, and both 6-pin and 8-pin jacks snapped into the housing. The two jacks were wired so he could use a common 6-pin phone cable to connect to to the 6-pin radios, and a common ethernet patch cord for the 8-pin radios. Or you could build it with one connector, and build an adapter starting with a 6-pin RJ-12 jack wired to a stub of a common 8-pin RJ45 ethernet cable.

    Schematic and Pinouts of Kenwood KPG-4 / KPG-46 cable (RS-232 to Radio)

    Last edited: Nov 13, 2019
  3. ZS1F

    ZS1F Ham Member QRZ Page

    @W9GB thank you so much for all the info! Much appreciated.

    Greetings from Cape Town, South Africa

    Andre ZS1F

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