Let’s start with the basics. I have the Yaesu FT-2600M VHF radio with a DB9 connector on the rear panel, Digirig RS232, RS232 Cable. I’m not sure this is the correct setup for this radio but I took a gamble and worst case I’m out on this specific cable as I can repurpose the digirig for the KX3 with a different cable or worse move solder around to change it for another setup.
Once I received the RS232 cable I checked the pinout with a continuity test. The plug end is a TRRS (3 black bands). The continuity test on the jack shows:
- Tip goes to pin 3 on the DB9
- 1st ring from tip end goes to pin 2 on the DB9 side
- 2nd ring No Connection
- Shield goes to pin 5 on DB9 side
- Pins 7 & 8 shorted together
I decided to look at the Yaesu FT-2600M Manual to see what the pinouts were for the DB9. PDF is available at Yaesu website for the radio.
FT-2600M DB9 Pinout
Pin 1-Squelch Signal Output
Pin 2-Packet RX Data Output 9600 BPS
Pin 3-Packet TX Data Input 9600 BPS
Pin 4-Packet Data Output 1200 BPS
Pin 6-Not used
Pin 7-External PTT signal Input
Pin 8-DC Output
Pin 9-Packet Data input 1200 BPS
I’m almost certain that RS232 cable isn’t the answer. Now next question is what do I need to make this work as my intention with this used radio I purchased with the DB9 was to put it to use in some some sort of digital/packet radio setup. I’m leaning towards dabbling with APRS and a raspberry pi zero 2W for that.
Do I need the audio and serial from the radio back to the digirig? If so can anyone walk me through this. Am I going back to the store or making cables for this setup and if so I need a schematic from someone clever enough to lay it out for me to follow. TIA for the help provided and information.