Curious me wanted to know the pinout of the plug on the back of my Hitec radios. Some time ago I made up a buddy cord for the Hitec Optic 6 and Hitec Laser 4. It took me a while to retrace those steps and find all the information used to make that cable. So here it is, this is how I made my Hitec buddy cord.

Below is an (ugly) ASCII drawing showing the pinout of the trainer cord connector on the Hitec transmitter.

            -------            1  ----  +V Switched
         /                    
        /      3              2  ----  PPM Out
       /  2    o    4         
           o       o           3  ----  PPM In
      |                 |      
      |  1o    o    o5  |      4  ----  +V 
      |        6        |      
                               5  ----  High to Disable RF
                     /        
           7 ___    /         6  ----  DSC 
            /     /          
            -------            7  ----  GND/Shield```

And coming right up… This is how I assembled the trainer cord. Two DIN connectors are required and a chunk of cable. The cable only works one way, one connector is therfore labeled master and the other student.

Student              Master
 
  1  -----------------  1 
  2  -----------------  3
  3  -----------------  2
  4  ---+
  5  ---+
  7  -----------------  7

Note: pins 4 and 5 bridged on student side

Some words of warning! The information presented is provided “as is” without any guarantees or warranty. I will not be responsible for any damage or losses of any kind caused by the use or misuse of the information.