Digi Interface for Icom IC-737AT
I have some problems with my radio in Digi modes. Start to search Interface with galvanic isolation between PC and Radio Transceiver. Found schematic and adapt for my situation. 2 little PCB. In one is Audio Interfaces with Critchley 9000 (CR/0059) Isolation Transformers, in second PTT+CW interfaces with Optoisolators CNY17. I use COM2 port for Digi modes and CW. COM1 used for CAT functions. Radio is Icom IC-737AT.
First PCB is Audio Interface. 63x35mm PCB created with Sprint-Layout.
Second PCB is PTT an CW Interface via COM2 port, 63x35 mm PCB created with Sprint-Layout