ic2410.1

800 MHZ ANTENNA INPUT
To receive 800 Mhz you need to add a new antenna input to connector J2
on the MAIN-B unit (UHF unit) which is the large circuit board on the
bottom of the radio.  J2 connects to a the B-band board which is a very
small daughterboard, that is connected to the MAIN-B board.  The service
manual offers no description of this board but it apparently is the 800
Mhz front end.

Two parts are needed:
One 5 3/4" grey coax jumper (this is available from ICOM but it doesn't
                                have a part number)

Either:
One OPC223 pigtail with UHF connector
        or
One OPC166 pigtail with N connector

The grey coax jumper has a plug on one end that mates with J2 and bare
leads on the other.  The pigtail also has two bare leads on one end.
This same end also has a metal flange thats designed to screw onto the
back panel of the radio after removing one of the dummy caps on either
side of the existing antenna pigtail.

Without going into too much detail, you must:

Remove the small metal cap nearest the bottom of the radio and next to
the existing pigtail.

Remove the metal shield at the back section of the Main-B unit.

Solder the two pieces of coax together, shield to shield, center to center
and screw this assembly on to the back panel.

Plug the grey cable into J2 and then reassemble the radio.