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Dantronik RT 5000 S

Dantronic RT5000

It's not too difficult to make the Dantronik RT-5000 R marine VHF suited for the reception of AIS by adding a discriminator output

The receiver IC is a TA7130. The demodulated signal can be found on pin 7.

Dantronic RT 5000
TA7130 pen 7
The TA7130
Pin 7 contains the baseband audio
Discriminator Output

Because pin 7 of the TA7130 is hard to reach from the component side, a connection is made on the solder side of the circuit board.

Follow the next steps to make the discriminator output:
  • Connect a 10 k resistor to pin 7 of the TA7130
  • Connect the positive lead of a 10 uF, 25V electrolytic capacitor to the resistor
  • If required, the resistor and capacitor can be fixed to the board with some hot glue
  • Connect the inner conductor of a piece of shielded wire to the negative lead of the capacitor
  • Connect the braid to the metal shield
  • Lead the shielded wire outside through a hole in the back
  • Mount a 3.5 mm mono audio connector on the shielded wire
The connection to pin 7
Shielded cable with 3.5 mm male connector

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