Frequency Ranges - Cobra 25 LTD Owner's Manual

Frequency Ranges

The Cobra 25 LTD Classic transceiver represents some of the most advance AM/FM
two-way radios used as a Class D station in the Citizens Band Radio Service.
These model features an advanced Software Defined frequency synthesizer IC
providing high stability coverage of all 40 CB channels.
CB Channel Channel Freq. In MHz
1 26.965
2 26.975
3 26.985
4 27.005
5 27.015
6 27.025
7 27.035
8 27.055
9 27.065
10 27.075
11 27.085
12 27.105
13 27.115
14 27.125
15 27.135
16 27.155
17 27.165
18 27.175
19 27.185
20 27.205
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CB Channel Channel Freq. In MHz
21 27.215
22 27.225
23 27.255
24 27.235
25 27.245
26 27.265
27 27.275
28 27.285
29 27.295
30 27.305
31 27.315
32 27.325
33 27.335
34 27.345
35 27.355
36 27.365
37 27.375
38 27.385
39 27.395
40 27.405
Specifications
GENERAL
Channels CB - 40 CH
Frequency Range CB - 26.965 to 27.405 MHz
Frequency Tolerance 0.005 %
Frequency Control PLL (phase lock loop) Synthesizer
Operating Temperature Range -30° C to + 50° C
Microphone Plug-in dynamic
Input Voltage 13.8VDC nom. (negative ground)
Current Drain Transmit: AM full mod., 1.5A (maximum)
Receive: Squelched, 0.3A;
full audio output, 1.2A (nominal)
Size 2.25" D x 7.25" W x 9.25" H
Weight 5.6 lbs.
Antenna Connector UHF; SO-239
Meter illuminated: indicates power output and relative received
signal strength
TRANSMITTER
Power Output 4 watts
Modulation AM (Amplitude Modulation) and FM (Frequency Modulation)
Frequency Response 300 to 3000 Hz
Output Impedance 50 ohms, unbalanced
RECEIVER
Sensitivity AM Sensitivity Less than 1uV for 10 dB (S+N)/N
FM Sensitivity -116 dBm @ 12 dB SINAD typical
Selectivity 6 dB @ 7 kHz, 60 dB @ 10 kHz
Image Rejection 80 dB, typical
Adjacent-Channel Rejection 60 dB, typical
IF Frequencies Double Conversion: 1st: 10.695 MHz, 2nd: 455 kHz
Automatic Gain Control (AGC) Less than 10 dB change in audio output for inputs from
10 to 50,000 microvolts
RF Gain Control Adjustable for optimum signal reception
Noise Blanker RF type
Squelch Adjustable; threshold less than 1µV
Audio Output Power 4 watts
Frequency Response 300 to 3000 Hz
Distortion Less than 5% @3 watts @ 1000 Hz
Built-in Speaker 8 ohms, 5w
External Speaker (Not supplied) 8 ohms; disables internal speaker when connected
PA SYSTEM
Power Output 4 watts into external speaker
External Speaker for PA 8 ohms, when PA-CB switch is in PA
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
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