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TUCoPS :: Radio :: ic2gat.txt

Modification for Icom 2GAT




IC2GAT

FROM    : WB5RZX @ WB5RZX
SUBJECT : MOD FOR IC-2GAT

OUT-OF-BAND TRANSMIT MOD FOR ICOM IC-2GAT HANDHELD 2M TRANSCEIVER
(COPIED FROM PACKET RADIO; ORIGIN UNKNOWN:)

BACK SIDE OF DISPLAY BOARD:
 _____________________________________ 
|                          D505        |          D507  D504      ___          |
           ___   ___     |___|                      |
|          |___| |___|                           --  + --
|   D506                    Q506           |           |
|    _O_------               _O_           |       HOLE FOR 
|   |___|     |             |___|          |       ON/OFF-VOL
|    O O      |              O O           |       CONTROL
|             |                |           |__________________
|              -----|<---------                              |
|          ADD DIODE: 1N914 OR EQUIV.                        |
|                                                            |

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.

REMEMBER: EXCEPT FOR MARS AND CAP, IT IS ILLEGAL TO TRANSMIT OUTSIDE 
THE HAM BANDS WITH NON-TYPE-APPROVED EQUIPMENT.

----- END OF MESSAGE 973 FROM WB5RZX @ WB5RZX. -----RELAYED  BY  N0KGX...GENE



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