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] Copied from the QRZ! Windows Ham Radio CDROM