>From: n2kzh@kb1bd.nj.usa.na (Bryan Todd)

THIS MOD IS FOR THE ALINCO DJ-500T, IF YOU HAVE LITTLE OR NO SOLDERING
EXPERIENCE DO NOT !!! REPEAT DO NOT TRY THIS MOD ON YOUR RADIO.  IT IS
NECESSARY TO REMOVE A CHIP RESISTOR FROM THE CPU BOARD.

TOOLS YOU WILL NEED: # 0 PHILLIPS SCREWDRIVER
                     25 WATT SOLDERING PENCIL,
                     EXACTO KNIFE.

I RECEIVED A SCHEMATIC AND BOARD LAYOUT FROM ALINCO FREE.  PHONE
1-213-618-8616. OR SEND A SASE TO ME AT : BRYAN TODD 318 ALDRICH ROAD
HOWELL, NJ 07731 AND I WILL SEND YOU A COPY OF THE BOARD LAYOUT.

1.  REMOVE THE BATTERY PACK
2.  REMOVE 3 SCREWS FROM THE BACK OF THE RADIO
3.  REMOVE 2 SCREWS FROM THE BOTTOM (FRONT PANEL SIDE)
4.  SPLIT THE CASE CAREFULLY.
5.  PUT THE RADIO FACE DOWN ON THE TABLE WITH THE TOP AWAY FROM YOU.
     THE SPEAKER AT THE BOTTOM.
6.  FIND THE "D" SHAPED GOLD PADS UNDER THE SPEAKER ON THE RIGHT SIDE OF BOARD.
7.  THE CHIP RESISTOR IS TWO PADS UP FROM THE "D" SHAPED ONES.
     THE NEXT STEPS CAN CAUSE GREAT ILLNESS TO THE RADIO !!!!!
8.  VERY CAREFULLY HEAT ONE END OF THE CHIP AND PRY WITH KNIFE.
9.  THEN HEAT THE OTHER END AND REPEAT UNTIL RESISTOR IS OFF THE BOARD.
10. HOLD THE BATTERY PACK IN CONTACT WITH BOTTOM OF RADIO, TURN ON RADIO,
     PRESS THE RESET BUTTON WITH TOOTHPICK (HOLE UNDER PTT SWITCH).
11. CHECK THAT YOU HAVE THE NEW FREQUENCIES THEN REASSEMBLE THE RADIO.


YOU CAN NOW PROGRAM
130.00 MHz TO 169.995 MHz
340.00 MHZ TO 379.995 MHz
420.00 MHz TO 469.995 MHz
870.00 MHz TO 899.995 MHz

WARNING !!!!!!! TRANSMITTING OUT OF THE HAM BANDS IS ILLEGAL !!!!!!!

SINCE YOU HAVE THE SOLDERING IRON HOT YOU CAN BUILD A NICE ACCESSORY.
REMOTE MICROPHONE AND SPEAKER.

TO MAKE A CABLE YOU HAVE TO BUY:
1/8" STEREO PLUG "RS #274-284"
1/8" TO 3/32" STEREO ADAPTER "RS # 274-373"
10 K OHM 1/4 WATT RESISTOR "RS # 271-1335"
10 MICROFARAD 35 VOLT CAP "RS # 272-1013"
MATE PLUG FOR YOUR SPARE MICROPHONE.
PLASTIC MINI BOX.

I MADE ONE WITH A 8 PIN STANDARD MIC PLUG SO I CAN USE MY SPARE HAND
MIC IN THE CAR WITH A 6" SPEAKER.

SPEAKER MIC CONNECTIONS:

SHELL      GROUND
TIP        REC AUDIO
RING       PTT & AUDIO IN.

CONNECT SHIELD, PTT COMMON AND SPEAKER COMMON TO THE SHELL.  CONNECT
SPEAKER PLUS TO THE TIP.  CONNECT A 10K OHM RESISTOR AND 10 MICROFARAD
CAP TO THE RING.  CONNECT THE PTT SWITCH BETWEEN THE SHELL AND THE 10K
RESISTOR.  CONNECT THE MIC PLUS TO THE 10 MICROFARAD CAP.  NOW YOU CAN
USE A REAL SPEAKER AND REAL MICROPHONE.  THAT WILL ALSO WORK FOR PACKET
BUT USE A .1 MICROFARAD CAP NOT 10 MF....

   |_____| SHELL
     | |
     | |
     |-|
     | |  ring
     |-|
      V   tip

WELL THATS ALL FOLKS......... 73'S FROM BRYAN (N2KZH)
