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Last modified 2024-10-27

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Cobra 31 Plus (By Dynascan)

A picture of Cobra 31 Plus (By Dynascan)

SPECIFICATIONS

GENERAL
Type:Citizen band transceiver
Frequency range:26.265-27.405 MHz
Channels / tuning steps:40
Mode:AM
Frequency control:PLL (SM5124A)
Frequency stability:0.005% @-30 to +50°C (-22 to +122°F)
Clarifier or Delta tune:No
Power supply:13.8 VDC (Male 3-pin jack)
Current drain / power consumption:RX: ? mA
TX: Max ? A
Antenna impedance / connector: CB: 50 ohm / SO-239
WX: 50-75 ohm / DIN41585 (Motorola)
Dimensions (W*H*D):? mm (?")
Weight:? Kg (? lb)
Other features: PA. ANL/NB. Dimmer. SWR-meter. Local/DX button.
Channel 9 button. 6 memories. NOAA weather channels.




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: 10.695 MHz
2nd IF: 455 KHz
Sensitivity:
Squelch sensitivity:
Selectivity:
Image rejection:
AF output power / speaker:? W at 10% distortion / ? ohm
External speaker connector:TS "Minijack" (3.5 mm)




TRANSMITTER SECTION
RF output power:4 W
Modulation system:
Max FM deviation (Factory set):No FM
Spurious emissions:Better than -? dB
Microphone impedance / connector:? ohm / 4-pin (Male locking ring jack)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Taiwan, 1987-1988 (Discontinued)
Main PCB:PA-255 By Uniden
Sub PCBs: PA-242AA - NB board
PA-243AA - VCO board
PA-256AA - Front board
PA-257AA - LED board
PA-258AA - WX board
PA-262      - SWR board
PA-265AA - Splitter board
Additional info:
Related documents: Service manual (5.2 MB)
AF amplifier: uPC1242H
PLL: SM5124A
RF driver: 2SC2086D
RF final: 2SC2166C
Approval / Market: USA
FCC ID: BBO9YR31PLUS
Sams Photofact #:None
Modifications and fixes:
Reviews:
Options / Accessories:
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