Dear Pasqule ,

hope to see you here fine and safe,

you can get the driver board from icom or a group of people can design the board (some years before i had done) ,but that small heat sink gasket like setup should be retained ,if possible the size of heat sink can be increased if some body has milling facility ,with a perfect heat sink compound and an external 13.5V cutoff can help our driver board live longer ,As all knows the driver board becomes excite or force to feed the PA with more current when the input voltage drops..

73s