Cobra 19 Ultra-II User Guide
Cobra Electronics Corporation
6500 W. Cortland Street
Chicago, IL 60707
place
stamp
here
19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 1
PRINTED IN THAILAND ©COBRA ELECTRONICS CORP. 1997 480-192-P-001
This device complies with Part 15 of the F.C.C. rules.
Operation is subject to the following conditions:
(1) This device may not cause harmful interference and
(2) This device must accept any interference received,
including interference that may cause undesired operation.
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40 CHANNEL
HOW TO USE YOUR
CITIZENS BAND
2-WAY MOBILE RADIO
WITH INSTANT EMERGENCY CHANNEL 9
MODEL
19 UL TRA
II
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CITIZENS BAND
2-WAY MOBILE RADIO
HOW TO USE YOUR
40 CHANNEL
MODEL
Contents Page
The CB Story ..................................................................................................1
Introduction
Frequency Range........................................................................................2
Specifications ..................................................................................................3
Installation
Location ......................................................................................................4
Mounting and Connections ..................................................................4-5
CB Antenna ................................................................................................6
Ignition Noise Interference ......................................................................7
Operation
Controls and Indicators....................................................................8-9-10
Operating Procedure to Receive ............................................................11
Operating Procedure to Transmit ..........................................................11
Maintenance and Adjustment ....................................................................12
Appendix
Ten Code....................................................................................................13
A Few Rules That Should Be Obeyed ..................................................14
How Your CB Can Serve You ................................................................14
Use Channel 9 for Emergency Messages Only....................................15
If You Need Service ......................................................................................16
Limited Two Year Warranty ......................................................................17
Accessories ..........................................................................Inside Back Page
19 ULTRA
II
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The CB Story
1
The Citizens Band lies between the shortwave broadcast and 10-meter
Amateur radio bands, and was established by law in 1949. The Class D
two-way communications service was opened in 1959. (CB also includes a Class A citizens band and Class C remote control frequencies.)
FCC regulations permit only ÒtransmissionsÓ (one party to another)
rather than ÒbroadcastsÓ (to a wide audience). Thus, advertising is not
allowed on CB channels because this is Òbroadcasting.Ó
Replacement or substitution of transistors, regular diodes or
other parts of a unique nature, with parts other than those recommended by Cobra, ma y cause violation of the technical r egulations of Part 95 of the FCC Rules, or violation of Type
Acceptance requirements of Part 2 of the Rules.
Citizens Band (CB) Radio operators are no longer required to
obtain an FCC license to operate their CB equipment or provide station identification.
Nevertheless, an operator of a CB radio station is still required
to comply with the communications act and with the rules of
CB Radio Operation.
Serial No.
Date of Purchase
Dealer Name
Keep this manual for detailed information
about your Cobra CB Radio System.
SAVE YOUR SALES RECEIPT, THE
CARTON AND “PACKING” FOR
POSSIBLE FUTURE USE.
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Frequency Range
Your COBRA CB radio provides high-level, trouble-free performance
over the following frequency assignments:
Channel Frequency Chann
Frequency
Channel in MHz Channel 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.
Introduction
2
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Specifications
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 -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 6-5/8ÓD x 4-9/16ÓW x 1-13/16ÓH
(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 cir-
cuits, 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 mis-
match 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 300-3000Hz.
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.)
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