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Yaesu VX-8r mic / gps cable pinout

Discussion in 'Ham Equipment' started by Moleculo, Dec 30, 2009.

  1. Moleculo

    Moleculo
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    Here is the pinout information for the Yaesu VX-8r speaker/mic & gps connector on the top of the radio. The connector on the VX-8r is the same as the Yaesu FTM-10 series mobile radio. This means you can use the Yaesu CT-M11 cable to wire the connector to whatever you desire. This chart shows the pinout for the connector, the pin function, and the associated wire color for the CT-M11 cable.

    <TABLE border=1><TBODY><TR><TH>Pin No.</TH><TH>CT-M11 Wire Color</TH><TH>VX-8 Series</TH></TR><TR><TD>1</TD><TD>Orange</TD><TD>MIC/PTT</TD></TR><TR><TD>2</TD><TD>Gray</TD><TD>3.3V</TD></TR><TR><TD>3</TD><TD>Brown</TD><TD>SP OUT</TD></TR><TR><TD>4</TD><TD>Green</TD><TD>GPS TXD (CONTROL)</TD></TR><TR><TD>5</TD><TD>Blue</TD><TD>GPS RXD (NMEA)</TD></TR>
    <TR><TD>6</TD><TD>Red</TD><TD>GND</TD></TR><TR><TD>7</TD><TD>Black</TD><TD>SP SEL (CONTROL)</TD></TR>
    </TBODY></TABLE>



    The attached conenctor diagram is from the perspective of looking at the radio. If you put a 22K resistor between pins 7 and 2, the internal speaker will be disabled, which is probably what you need to do if you are going to use the cable for programming.
     

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  2. C2

    C2
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    Goodie. Is the nmea line rs232 serial or ttl serial or low voltage serial. probably 3.3V TTL. any knowledge of the data rate? I wonder which GPS module they are using. That would explain it all.
     
  3. Moleculo

    Moleculo
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  4. aquaregia

    aquaregia
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    Probable manufacturer of GPS module

    I think the module is produced by Positions, Inc., a subsidiary of Chiyoda Electronic Company. Found this (probable predcesor of the unit in the Yaesu module)

    http://www.cec-chiyoda.co.jp/info/GPS_Rev1.pdf which lists the GPS72(B)038 model number.

    They're on the GPS 75 series, so I'll poke around and see if I can find a datasheet for the GPS72(C)042.

    Happy trails.
     
  5. aquaregia

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