How to modify the UK Alinco DJ-446 446MHz PMR Handportable Radio power output from the default 500mw to 5 Watts.

Remove the antenna/MIC/Sp cover rubber and mail dial. No tool is required but just carefully pull them out. With slightly enlarging the bottom of the front plastic case toward outside by hand, take the metal main chassis out of the case. No screw is used. Be careful; the chassis and the case is connected with a speaker cable harness. There is a small connector at the left side of LCD. Remove it before you completely separate the unit.

On the main unit circuit board, just below the antenna there is a screw and there is another one just about 2cm below. Between the screw and a black square component, there is a blank terminal without any component soldered. Solder this terminal (close circuit).

Reassemble the unit. No CPU reset is necessary.

Kind Regards

Martin Higgins

ICQ#: 128096269
 

To change the display from freq to channel numbers there is a shuntable resistance R213 found on the main PCB behind a metal plate.

First open the radio and unscrew the main PCB. Gently turn over the main PCB and desolder the metal plate on the bottom of the pcb.

You can program the frequencies in the freq display mode then remove the shunt to pass on ch display.

Regards Colin