Icom IC-3220H (IC 3220 H IC3220H) transceiver mods reviews software and diagrams

To extend the receiver range on VHF:
118.000mhz (AM) to 174.000mhz (FM)
Cut D6 on the LOGIC board (located on the front of the radio)

To extend the receiver range on UHF:
400.000mhz to 479.000mhz
Cut D4 on the LOGIC board.

To extend transmitter range on VHF:
136.000mhz to 174.000
Solder a bridge between the solder pads next to D9

To extend transmitter range on UHF:
400.000mhz to 479.000mhz
Install 1SS190 (diode) at D9 position on the LOGIC board.