Introduction; Frequency Range; Specifications - Cobra 19 DX II How To Use Manual

Introduction

Frequency Range

Your COBRA CB radio provides high-level, trouble-free performance
over the following frequency assignments:
Channel Channel Frequency
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
These frequencies are generated and accurately controlled by a phase
lock hoop (PLL) circuit, comprised of the latest state-of-the-art
integrated circuit technology, ensuring high reliability and excellent
frequency stability on the above channels.
To obtain maximum performance please read carefully the
descriptions and operating instructions in this manual.
Channel Channel Frequency
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
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Specifications

GENERAL
Channels 40.
Frequency Range 26.965 to 27.405 MHz.
Frequency Control Phase-Locked Loop (PLL) synthesizer.
Frequency Tolerance 0.005%.
-22 ° F to +122 ° F (-30 ° C to +50 ° C).
Operating Temp. Range
Microphone Plug-in type; Electret condenser.
Input Voltage 13.8V DC nom. (negative ground).
Current Drain Transmit: AM full mod., 1.5A (maximum).
Receive: (Squelched, 0.115A, full audio
output 1.0A (nominal).
Size 6-5/8"D x 4-9/16"W x 1-13/16"H
(165mm x 116 mm x 44 mm.)
Weight 3 lbs., 4 oz. (1.0 kg.).
Antenna Connector UHF, SO-239.
Semiconductors 22 transistors, 17 diodes, 3 integrated
circuits, 7 LEDs.
Meter Indicates relative power output and
received signal strength.
TRANSMITTER
Power Output 4 watts.
Modulation High- and low-level Class B amplitude.
Frequency 300 to 3000 Hz.
Output Impedance 50 ohms, unbalanced.
Output Protection Output transistors protected against
mismatch up to 20:1.
RECEIVER
Sensitivity Less than 1µV for 10dB(S + N)/N.
Selectivity 6 dB @ 7 KHz, 55dB @ 15 KHz.
Image Rejection 60 dB typical.
Adjacent CH. Rejection 50 dB, typical.
IF Frequencies Double conversion, 1st:
Automatic Gain Control Less than 10dB change in audio output for
(AGC) inputs from 10 to 50,000µV.
Squelch Adjustable; threshold less than 1µV.
Audio Output Power 3 watts.
Frequency Response 300-3000 Hz.
Distortion Less than 10% @ 3 watts @ 1000 Hz.
Built-in Speaker 8 ohms, round.
External Speaker 8 ohms; disables internal speaker when
(Not Supplied) connected.
PA SYSTEM
Power Output 4 watts into external speaker.
External Speaker for PA 8 ohms; a separate jack is provided.
(Not Supplied)
(Specifications subject to change without notice.)
10.695 MHz.
2nd: 455 KHz.
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