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INTRODUCTION

UNIDEN  has  combined  superb  workmanship  and  modem  Styling  with  the  very  la ­
test  state-of-art  circuitry  to  bring  you  the  new  AX   144  Citizens  Band  Transceiver.

It  has been  especially designed to give  you  maximum  performance  and 

reliability. 

Vour  AX   144  is  completely  factory  aligned  and  quality  assurance tested.
To  obtain  the  maximum  benefit  and  pleasure  from   your  A X   144  please  read  very 

carefully  the  contents  o f  this  manuał  before  attempting  to  install  or  operate  the 

transceiver.

FEATURES

•   A L L   SOLID  STATE:  IC  and  Transistorized  construction,  w ith  low current drain, 

for  a long,  trouble-free  life.

•   FULL  40-CHANNEL  OPERATION:  PLL  frequency,  Synthesizer  circuitry  allows 

transmission  and  réception  on  ail  40-channels  on  AM,  USB  and  LSB  w itho ut the 

purchase  of  any  additional  crystals.

•   LARGE  LED  CHANNEL  DISPLAY:  Channel  number  is displayed  by  use of  LED 

(light em itting  diode)  display  for ease  of channel  sélection.

•   CLEAN  SIGNAL:  Transmitter  audio  processing  circuitry  produces  a  clean  signal 

with  maximum  legal  modulation,  for  best  range.

•   QUIET  RECEPTION:  Effective  squelch  and  automatic  noise  lim iter  and  an  RF 

noise  blanker for superior  quieting.

•   EFFECTIVE  AGC:  Receiver  amplified  automatic  gain  control  (AGC)  reduces  the 

effect  of  différences  in  received  signal  strengths.  No  distracting  "blasting"  and 

“ fading" of  signais.

•   AN  EFFICIENT  TRANSMITTER: Provides  maximum  legal  output  power  to the 

antenna.

•   PUBLIC  ADDRESS  FUNCTION:  Useful  for  paging  and announcements.

•   TR IC O LO R   LED  MODE  INDICATOR:  Green  for  AM  mode,  Yellow  for  USB 

mode  and  Red  for  LSB  mode.

•   EMERGENCY  CH  9  SWITCH:  This  switch  enebles  you  to  select  emergency 

channel  (CH  9)  regardless o f the  channel  selector  switch  setting.

-  4  -

Summary of Contents for AX 144

Page 1: ...unlden 144 CB RADIO OWNERS MANUAL...

Page 2: ...ious accessory antenna and power r ceptacles as well as the SERIAL NUMBER You are urged to record your model number and your SERIAL NUMBER in the spaces provided below Model________________ __________...

Page 3: ...Connector UHF SO 239 Semiconductors 47 transistors 5 integrated circuits 66 diodes and 6 light emitting diodes Meter Illuminated indicates relative power output and received signal strength green rece...

Page 4: ...5 MHz Adjustable for optimum signal r ception AGC Less than 10 dB change in audio output for inputs from 10 to 500 000 microvolts Squelch Noise Blanker Clarifier Range Audio Output Power Frequency Res...

Page 5: ...LSB without the purchase of any additional crystals LARGE LED CHANNEL DISPLAY Channel number is displayed by use of LED light emitting diode display for ease of channel s lection CLEAN SIGNAL Transmit...

Page 6: ...radio please read carefully the following descriptions and operating instructions NOTE This radio has been designed for operation in the 11 meter Citizens Band Radio Service It uses a frequency synth...

Page 7: ...ust be mechanically strong Proceed as follows to mount the transceiver 1 After you h ve determined the most convenient location in your vehicle hold the radio with mounting bracket in the exact locati...

Page 8: ...large trucks may use a positive ground system 1 Negative ground system Connect the Red power lead from the radio to the positive or battery terminal or other convenient point and connect the Black po...

Page 9: ...e power supply capable of supplying 2 5 amps at a 13 8V DC output with a nominal input voltage of 120 volts AC 50 60Hz Simply connect the red and black leads of the transceiver to the correspond ing D...

Page 10: ...turn the transceiver on rotate the control clockwise past cl ick turn the transceiver off rotate the control counterclockwise past click Rotate the control clockwise for a comfortable audio volume le...

Page 11: ...up to 100 depending on the setting of the microphone gain control using the microphone provided with the unit UNIDEN s automatic compression and peak limiting circuits assure maximum modualtion with m...

Page 12: ...hes from your mouth and speak at a normal voice level RECEIVE OPERATING PROCEDURE 1 Place the CB switch in CB position 2 Turn the set on by turning the VOLUME CONTROL clockwise past click NOTE Microph...

Page 13: ...WARNING Operation of this equipment requires a valid station license issued by the Depart ment of Communication Do not transmit with your equipment until you h ve a license 12...

Page 14: ...pecially designed for the environment encountered in mobile installations The use of all solid state circuitry and its light weight resuit in high reliability Should failure occur however replace part...

Page 15: ...CIRCUIT DIAGRAM FOR AX144 UTUA07524TA Printed in The Philippines J _ _ _...

Page 16: ...ponent will at our discr tion will be replaced without charge when the defective product is delivered to the warrantor at 345 Princes High way Rockdale N S W 2216free and elear of ail liens and encumb...

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