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Modifications for the Alinco ALR-22

 
Extended frequency RX/TX of the ALR22T & ALR22HT
 
     

 
  1. Take out the top and bottom covers.

     
  2. Lose and pull the 4 screws that hold the front panel assembly to the main chassis.

     
  3. Remove front panel to away from the main chassis very gently.

     
  4. Locate the Volume Squelch pot on the left side of the radio.

     
  5. Locate the VFO control on the left side of the radio.

     
  6. Between the two above units is an IC that runs vertically between the two units. (ONLY THE 12 PINS OF THE IC ARE SEEN FROM THE BACK)

     
  7. Now locating the IC locate 3 sets of unsoldered jumper pads between the IC pins.

     
  8. Solder bridge between the top 2 pads, then the middle 2 pads, then between the bottom 2 ONLY of the bottom set of 3 pads.

     
                        REAR VIEW OF FRONT PANEL
    

                                          

     

  9. Reassemble radio.

     
  10. Reset microprocessor.

This mod will extend the RX range as well as the TX range of the above unit. The display will have a range from 29mhz to 299 MHz but this is just an erroneous display as the PLL on a typical radio will rx between 130 MHz and 180mhz with a TX range that may be a little beyond these these frequencies.
 

ALR-22T
                        Microphone Mod

1- Take out the battery and antenna.

 2- put away the top and bottom covers for the component view.

 3- Remove Main dial, Vol & SQL knobs, Remove the retaining rings.

 4- Access front panel circuit board.

 5- Locate and remove mic Green, Orange & Purple wires.

 6- Solder the wired as shown in drawing.

 7- Reassemble the radio.

 8- Open Mic.

 9- Remove the ground side of the Up/Down button and tie then together.

10- Connect the orange wire to the two tied wires.

11- Reassemble the Mic.

                                

  Enjoy Jorge