OUT-OF-BAND TRANSMIT MOD FOR ICOM IC-2GAT HANDHELD 2M TRANSCEIVER


Back side of display board:
 _____________________________________ 
I                          D505        \
I          D507  D504      ___          \
I           ___   ___     I___I          \             I
I          I___I I___I                    \        --  + --
I   D506                    Q506           I           I
I    _o_------               _o_           I       hole for 
I   I___I     I             I___I          I       on/off-vol
I    o o      I              o o           I       control
I             I                I           I__________________
I              -----K----------                              I
I          add diode: 1N914 or equiv.                        I
I                                                            I

Connect diode between top lead of D506 and lower right lead of 
Q506 as shown.

Notes: D506 may be absent.  If not, remove it.
       Reset CPU if needed.
---
A friend did this and his IC-2GAT can now transmit 138 to 178 MHz (no 
RF power output measurements were made).  He did no retuning, and did 
not have to reset the CPU.  He used a tiny axial-lead glass diode, 
replaced its leads with wire-wrap wire, and encased it in shrink-tube.
The operation requires a super-tiny soldering iron.  Observe CMOS 
soldering precautions: Unplug the iron and ground the tip before 
touching the circuit.