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IC2GAT
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1990-08-27
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2KB
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42 lines
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