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Last modified 2025-05-18

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Uniden AX-144

A picture of Uniden AX144 / AX-144

SPECIFICATIONS

GENERAL
Type:Citizen band transceiver
Frequency range:26.965-27.405 MHz
Channels / tuning steps:40
Mode:AM / SSB
Frequency control:PLL (uPD2824C)
Frequency stability:0.001% @ -10 to +50°C (14 to 122°F)
Clarifier or Delta tune:±1 KHz
Power supply:11.7-15.9 VDC (Male 3-pin jack)
Current drain / power consumption:RX: Max 600 mA
TX: Max 2.2 A
Antenna impedance / connector:50 ohm / SO-239
Dimensions (W*H*D):185*58*231 mm (7.3*2.3*9.1")
Weight:2.04 Kg (4.5 lb)
Other features:PA. ANL/NB. Channel 9 button. Dimmer.




RECEIVER SECTION
Receiver system: Single conversion superheterodyne
IF: 10.695 MHz
Sensitivity: AM: 0.5 uV (10 dB S+N/N)
SSB: 0.25 uV (10 dB S+N/N)
Squelch sensitivity:Less than 0.5 uV (Threshold)
Selectivity:AM and SSB: 4.2 KHz (-6 dB)
7 KHz (-60 dB)
Image rejection:75 dB
AF output power / speaker:3 W at 10% distortion / 16 ohm
External speaker connector:TS "Minijack" (3.5 mm), 8 ohm




TRANSMITTER SECTION
RF output power: AM: 4 W
SSB: 12 W (PEP)
Modulation system:AM: High and low level Class B
SSB: Balanced
FM deviation (Factory set):No FM
Spurious emissions:Less than -? dB
Microphone impedance / connector:? ohm / 4-pin (Male locking ring jack)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Taiwan (Early) and Philippines (Later & final), 1981-199x (Discontinued)
Main PCB: Early and later
PC-833AD by Uniden
Single sided with through-hole components
Final revision
PC-? by Uniden
Single sided with through-hole components
Sub PCBs: PB-006AA - Mode switch and LED board
PB-007AA - Channel display and LED board
PB-008AA - Channel selector board
PB-009AA - Push switch board
PC-266AA - Mike jack board
Additional info:
Related documents: User manual (3.4 MB)
Service manual (11.9 MB)
PLL: uPD2824C
AF amplifier: uPC1182H (Early and later)
AF amplifier: uPC1242H (Final revision)
RF driver: 2SC2166C
RF final: 2SC2312C
Market(s) / Approval(s): USA
FCC ID: AMX9YRAX176
Australia
DOC ID: 249A016 (Early)
DOC ID: RB249A037 (Final revision)
Sams Photofact #:None
Modifications and fixes:
Reviews:
Options / Accessories:
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A rear picture of Uniden AX144 / AX-144