IC7100 daughter board?

[WW3S]

Getting ready to equipm our new EOC/911 center with a new setup, that requires no RF in the actual center, the radios will be stationed in an equipment room at the base of the tower, the consultants doing the ham equipment have worked with remote rig in the past, but not with a IC-7100....I understand the 7100 will work with the control head in one location and the radio out in the equipment room, but that an add on board needs installed if using an IC-7100....can someone explain this further please?

[sm2o]

ICOM have made a hardware modification lately (March 2014) which makes later produced rigs  incompatible with  the orginal Remoterig boxes (New IC-7100 control panels are also incompatible with old IC-7100 main units). The reason of the modification was to avoid that data communication will be heard in FM mode at low modulation leves. They have solved it by reducing the amplitude of the data sent from control to main unit.  To handle this modification in the Remoterig a interface PCB called 1258M has to be installed in strap socket of the Control-RRC. This board is quite simple and can be built by your self also ( see info here).

The ICOM modification was done from serial numbers US>02003001 and in EU>03003601

 /mike

[WW3S]

thanks !!!!!