On 07/24/20 15:18, Gerald Payton via AMSAT-BB wrote:

I just renewed membership and request information about compatibility on my radio ( IC-2730A ) for working the FM birds.

I was hoping to use my IC-2730A along with HRD but cannot find a CAT cable for compatibility. HRD lists the 2730 as an available radio but no joy connecting.

I am hoping to connect with someone that IS or HAS used this radio with or without HRD for help.

Hello Jerry,

The CAT control protocol is specific to Yaesu radios, with the physical interface being a 9-pin RS-232 port. My FT-847, for instance, has a CAT serial port on the back of it.

Icom uses CI-V, which is a multi-drop serial port, somewhat like RS-423 except that the voltage levels are +5V and 0V. (http://www.plicht.de/ekki/civ/civ-p1.html) On my IC-746PRO, this manifests as a 3.5mm headphone jack.

It appears that you'd need the optional OPC-478UC unit to use CI-V control of this rig.

I don't know anything about HRD, assuming you mean Ham Radio Deluxe.

--- Zach N0ZGO