Identifying your R/C Transmitter and the trainer socket:

The socket usually resides at the rear of the R/C Transmitter. Do not confuse it with the charger (DC) socket.
Find the socket with the six small holes inside a round area with a notch:

What you will need:

1. Six-pin DIN plug that fits into the trainer socket.
   
2. One 3.5mm audio (mono) jack that fits into the your soundcard’s audio input (e.g. Microphone). As in the following figure
3. About 2 meters of cable by which you will connect your R/C Transmitter to the sound cardsound card. The cable should consist of 2 or more electrical wires. It is preferable that the wires will be coated with insulators of different colours so you can distinguish between the two.
4. Soldering equipment.

Soldering:

• Use the connection diagram to guide you in your work.
• The plug is viewed from behind the plug, the way you see it while soldering.
• The signal line (red) connects pin 2 to the central tab of the audio jack.
• The ground line (black) connects the plug's metallic shield  to the external tab of the audio jack.
• Connect pin 4 to pin 5.