Radio interface RI-2 with CW and CAT

Interface board RI-2 V2.1 with CW and CAT

Suitable for:

  • Echolink
  • Freeradionetwork
  • Digital Master
  • Fldigi
  • Hamradio Deluxe
  • Logger32
  • and other software for digital modes


PTT Trigger from PC:

  • RS232 port (RTS or DTR per function)
  • Pilot tone (loud/strong signal), in certain software as Freeradionetwork


PTT Trigger to RADIO:

  • Isolated, optocoupler (for PTT and CW)



  • Non-isolated RS232 to TTL converter with MAX232
  • Tested with: GBCAT, Logger32 and Hamradio Deluxe


Connection diagram: