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QRZ! Ham Radio 13
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QRZ Ham Radio Callsign Database - Volume 13.iso
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alr22t.txt
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1999-04-07
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66 lines
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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