So don't expect Icom to replace the CT-17 anytime soon. I still feel that this Icom accessory needs to be updated into the 'current century'.or one can buy a newer Icom radio and have direct control of it through a standard B to A USB cable. They work as they should, without issues. I now have the CT-17 connected from my computer via a DB-9 to DB-25 cable to both a 706 series radio and a 746pro. Shotgunning all of those parts, together, got it working.
Monitoring the RS232 line with an analog (metered) VOM while attempting a connect to a 'hypothetical IC-706' at 300 baud made the meter needle wiggle. I changed all of these caps in the +DC input to +/-DC converter circuitry that's part of the MAX232 IC, as well as the IC itself. This summer, I bought three more MAX232 16 pin DIP IC's and secured a new handful of electrolytics.
