Cobra 19 DX II, How To Use Manual

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Frequency Range
Your COBRA CB radio provides high-level, trouble-free performance
over the following frequency assignments:
Channel Channel Frequency Channel Channel Frequency
in MHz in MHz
1 26.965 21 27.215
2 26.975 22 27.225
3 26.985 23 27.255
4 27.005 24 27.235
5 27.015 25 27.245
6 27.025 26 27.265
7 27.035 27 27.275
8 27.055 28 27.285
9 27.065 29 27.295
10 27.075 30 27.305
11 27.085 31 27.315
12 27.105 32 27.325
13 27.115 33 27.335
14 27.125 34 27.345
15 27.135 35 27.355
16 27.155 36 27.365
17 27.165 37 27.375
18 27.175 38 27.385
19 27.185 39 27.395
20 27.205 40 27.405
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.
2
Introduction
3
GENERAL
Channels 40.
Frequency Range 26.965 to 27.405 MHz.
Frequency Control Phase-Locked Loop (PLL) synthesizer.
Frequency Tolerance 0.005%.
Operating Temp. Range -22
°
F to +122
°
F (-30
°
C to +50
°
C).
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: 10.695 MHz.
2nd: 455 KHz.
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.)
Specifications