I am sure they work fine, but there has been a lot of controversy over cheap replicas that have caused trouble. 'jwt873' also recommends the USB to Serial Port converter cables with the FTDI chip. The only time I ever had trouble with my interface was when I had the RS-232 RX/TX pins swapped. I prefer the 9 pin ones, but I have used the 25 pin variety. USB to Serial Port converter cables can be bought with either the 25 or 9 pin connectors. The drawing is marked for using 25 or 9 pin RS-232 connectors. The interface I built works with any of the digital mode software that includes rig control (HRD, Fldigi, etc.).Īttached is the schematic of the CI-V interface that I built. On the IC-735 it is a jumper setting, as opposed to the IC-707 which is a menu selection. By default the IC-735 comes configured for 300 baud, but I kicked that up to 9600 baud. I have a IC-735 which has the same CI-V port. It is a good interface, but a bit of an overkill if you are only accessing one unit.
Icom specs out a CT-17 interface for CI-V communication. As 'jwt873' indicated, it is a bi-directional 2 wire TTL buss. The CI-V connector on the IC-707 is a 1/8 inch, two conductor connector. I agree, that cable you show will not work with your IC-707.
