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  Connection of the KENWOOD TS440S to a DATA terminal such as a Kantronics
  ~~~~~~~~~~~~~~~~~ KAM using the rear ACC2 13 pin jack.~~~~~~~~~~~~~~~~~~
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

                            ACC 2
                      ЙННННННННННННННННН»
                ЪДДДДДЧД 4 і 3 і 2 і 1  є
 TNC GROUND ДДДДґ     є ДДДЕДДДЕДДДЕДДД є
                ГДДДДДЧД 8 і 7 і 6 і 5  є
                і     є ДДДЕДДДЕДДДЕДДД є
                АДДДДДЧД 12і 11і 10і 9 ДЧДДДДДДДДї
                      ИННННННШНН»ДДБДЙННј        і
    TNC AUDIO ДДДДДДДДДДДДДДДЩ  є 13 є           і
                                ИНШННј           і
                                  і              і
                                \ДБД/  Diodes  \ДБД/
                                 \_/   1N4148   \_/
                                 ДЕД            ДЕД
                                  і              і
                                  АДДДДДДДВДДДДДДЩ
                                          і
                                          і

                                       TNC PTT


        Pins          і  Application
      -----------------------------------------------------------------
                      ЪДД
         3 ДДДДДДДДДДДґ Data output - not used as the level is very low
                      і the prefered connection is via the speaker output
                      і this also allows fine adjustment of level to
                      і enable best decoding. (A switch on the speaker to
                      і 'mute' it when required is a good idea.)
                      АДД
        ДДДї          ЪДД
         4 і          і Ground - you may have to experiment with these
         8 ГДДДДДДДДДДґ connections to eliminate RF feedback and noise.
        12 і          і Here they are all strapped.
        ДДДЩ          АДД
                      ЪДД
         9 ДДДДДДДДДДДґ Mic mute - prevents audio pickup from the mic when
                      і earthed. By connecting to the PTT line as shown
                      і through a diode automatically MUTES the mic when
                      і using data. When the front panel PTT or MIC PTT
                      і are used the microphone is 'live'.
                      АДД
                      ЪДД
        13 ДДДДДДДДДДДґ Standby - PTT which when taken to ground puts the set
                      і 'on air'. By connecting through a diode as shown
                      і doesn't affect the PTT operation but allows auto
                      і mic muting.
                      АДД

The diodes used can be virtually anything, here they are 1N4148.

The INPUT audio to pin 11 must be quite a high level. If using a KAM you are
certainly going to have to change the HF LEVEL JUMPER in the KAM. The level
of the KAM as shipped suites connection to the FRONT PANEL MIC but not the
rear connector, you can however correct this with the jumper. People using
the PK232 have complained of NO TX AUDIO, I suspect the level is so low that
only local minitoring will show a level present.