Alinco DR-430
 

Extended RX and TX

Extended TX is possible when red loop wire is cut, blue will open RX. See the above modification to separate the radio.
 

This is the Alinco DR-430 Extended TX modification. This modification will expand TX coverage to 403-499 MHz. Please follow the steps and do the work CAREFULLY! This modification works great in my rig and I assume this modification will work on almost all 430's (no warranty implied).
 

  1. 1- Unscrew the 3 small screws on the top cover.
     
  2. 2- Gently remove the top cover.
     
  3. 3- Cut the little loop wire (blue) that's located just behind the display, 2" left from the Power button.
     
  4. 4- Reassemble the radio.
     
  5. 5- Reset the radio's CPU by turning power ON while pressing the F key.
Alinco DR-430 9600 Bps modification
This is the Alinco DR-430 9600 Bps modification. This modification will allow the use of a G3RUH/NB96 9600 Bps packet radio/satellite modem. Please follow the steps and do the work VERY CAREFULLY as this rig uses SMC technology! This modification works great in my rig and I assume that it will work on almost all 430's (no warranty implied).
 
  1. Unscrew the 3 small screws on the top cover.
     
  2. Gently remove the top cover and unplug the speaker connector.
     
  3. Remove the bottom cover by unscrewing the 3 small screws.
     
  4. Remove the VFO, VOL and SQL knobs from the front panel.
     
  5. Carefuly remove the front panel's plastic cover.
     
  6. Unscrew the 3 small screws that hold the front panel board attached to the main board.
     
  7. Pull out gently the front panel's board.
     
  8. Locate pin #2 of the microphone connector and solder a small wire to it (this will be the PTT wire).
     
  9. Remount the front panel's board and screw the 3 small screws.
     
  10. Carefully remount the front panel's plastic cover and place the 3 knobs in their proper positions.
     
  11. In the main board (bottom side) locate the TK10487M chip.
     
  12. Solder the inner conductor of an RG-174 coaxial cable to pin #11 (this will be the Audio-to-modem wire).
     
  13. Locate the CN302 connector (just under the other's side shielding).
     
  14. Solder the inner conductor of an RG-174 coaxial cable to pin #1 (this will be the Audio-from-modem wire)
     
  15. Solder a wire to pin #2 (ground).
     
  16. Very carefully drill a 1/4" hole on the radio's back, just near the SP.OUT connector and pass through it all the new wires.

     
  17. Reassemble the radio.

     
  18. Connect the new wires to the modem and adjust it to properly handle the signal levels.
Notes:
 
  1. The Audio-to-modem signal level is lower than the one you can get from a Yaesu FT-736r.

     
  2. The Audio-from-modem signal feeds the varactor diode (D303) through a 47K resistor (R324) so you must adjust the modem's output to provide enough signal level to drive the varactor properly.


 

ATTENTION
The KB2LJJ takes no responsibility for any damage during the modification or for any wrong information made on this modification.