Subject: Extended frequency rx and tx of the ALR22T & ALR22HT
          ALINCO 2 METER RADIOS.

      BEWARE OF ANY STATIC WHEN WORKING WITH THIS RADIO !!!

  1 Remove the top and bottom covers of the radio.

  2 Remove the 4 screws that hold the front panel assembly to the main
    chassis.

  3 Pull front panel 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 After locating the IC locate 3 sets of unsoldered jumper pads between
    the IC pins.

  8 Make a 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

    / ------\  12 PIN   O  *  O                        /---------\
   / VOLUME  \  IC ->      |<-SOLDER BRIDGE           /           \
  / CONTROL   \         O  *  O                      /             \
 /             \                                    /     VFO       \
 \             /        O  *  O                      \  CONTROL     /
   \         /             |<-SOLDER BRIDGE           \           /
     \-----/            O  *  O                        \--------/

                        O  *  O
                           *  DO NOT SOLDER THE TOP PAD
                        O  |< O   OF THESE 3 PADS
                           * \SOLDER BRIDGE HERE

  9 RE-ASSEMBLE RADIO .

 10 RESET MICROPROCESSOR.

 11 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 erroneos 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.


    GOOD LUCK AND HAPPY MODING

    73 CARL

    Packet: VE3ZCO@VE3GYQ

    Internet: VE3ZCO@ardsley.business.uwo.ca

    CARL VE3ZCO [44.135.80.8]
 
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