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RECEIVER

Sensitivity

SSB:  Better  than  ,25 pV  for  10 dB

(S+N)/N  at  greater  than  ’/a  w att  of  audio 

output

AM:  Better  than  .5 p V   for  10 dB

(S+N)/N  at  greater  than 

'A

  w att  of  audio

Selectivity 

Cross  Modulation 

Image  Rejection 

I.F.  Frequency

AM  and  SSB  RF  Gain  Control 
Automatic  Gain Control

output

SSB  and  AM :  6  dB  @ 4.2  kHz,  60 dB  @  7.0 kHz

More  than  50 dB

More  than  75  dB

AM  and SSB:  10.695 MHz

Adjustable for  optimum signal  réception.

(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  Response 
Distortion 
Built-in  Speaker

External  Speaker  (Not Supplied)

Adjustable;  threshold  less than  .5 pV.

RF  type,  effective  on  AM  and  SSB.

±1.0 kHz

3 watts  into  8 ohms 
350 to  2500  Hz

Less than  10%  at  3 watts  output.
16 ohms,  round

8  ohms;  disables  internal  speaker  when  con­

nected.

PA  SYSTEM

Power Output 

External  Speaker for  PA

3 watts  into external  speaker. 

8  ohms  (not supplied)

-   3  -

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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