Cobra 19ULTII Operating instructions

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.

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 2

40 CHANNEL

HOW TO USE YOUR

CITIZENS BAND

2-WAY MOBILE RADIO

WITH INSTANT EMERGENCY CHANNEL 9

MODEL

19 ULTRA

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 3

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

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 4

The CB Story

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 in-

cludes 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 rec-

ommended by Cobra, may cause violation of the technical reg-

ulations 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 pro-

vide 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.

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 5

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 integrat-

ed circuit technology, ensuring high reliability and excellent frequency

stability on the above channels.

To obtain maximum performance please read carefully the descrip-

tions and operating instructions in this manual.

Introduction

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 6

Specifications

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 out-

put 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.)

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 7

Installation

Location

Plan the location of the transceiver and microphone bracket before start-

ing the installation. Select a location that is convenient for operation and

does not interfere with the driver or passengers in the vehicle. In auto-

mobiles, the transceiver is usually mounted to the underneath of the

dash panel, with the microphone bracket beside it.

Mounting Connection

The transceiver is held in the universal mounting bracket by two thumb

screws, permitting adjustment at the most convenient angle.

Auniversal mounting bracket is supplied along with self tapping

screws and star washers. The mounting must be mechanically strong

and also provide a good electrical connection to the chassis of the vehi-

cle. To mount the transceiver:

1. Determine the most convenient location in your vehicle. Hold the

COBRA radio with mounting bracket in the exact location desired. If

nothing will interfere with mounting it in the desired position,

remove the mounting bracket and use it as a template to mark the

location for the mounting screws.

2. Drill necessary holes and secure mounting bracket in location.

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 8

Installation (Cont.)

3. Connect the antenna cable plug to the standard receptacle on the

unit. Most CB antennas are terminated with a type PL-259 plug

which mates with the receptacle marked ÒANT.Ó

4. Connect the red lead of DC power cord to +13.8VDC. In automo-

bile installations, +13.8VDC is usually obtained from the accessory

contact in the fuse box. This prevents the set being left on acciden-

tally and also permits operating the unit without the vehicleÕs

engine running.

Before installing the CB radio, visually check the vehicle battery

connections to determine which battery terminal, positive or neg-

ative (positive is the larger of the two) is grounded to the engine

block (or chassis).

5. Connect the black lead to the negative side of the automobile. This

is usually the chassis of the car. Any convenient location with good

electrical contact (remove paint) may be used.

6. Mount the microphone bracket on right side of the transceiver, or

near it using two screws supplied. When mounting in an automo-

bile, place the bracket under the dash so the microphone is readily

accessible.

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 9

Installation (Cont.)

CB Antenna

Since the maximum allowable power output of the transmitter is limit-

ed by the FCC, the antenna is one important factor affecting transmis-

sion distance. Only a properly matched antenna system will allow max-

imum power transfer from the 50-ohm transmission line to the radiat-

ing element. In mobile installations (cars, trucks, boats, etc.), an anten-

na system that is non-directional should be used.

Avertically polarized, quarter-wavelength whip antenna provides the

most reliable operation and greatest range. The shorter, loaded-type

whip antennas are more attractive, compact and adequate for applica-

tions where the maximum possible distance is not required. Also, the

loaded whips do not present the problems of height imposed by a full

quarter-wavelength whip.

Mobile whip antennas utilize the metal body of the vehicle as a ground

plane. When mounted at a corner of the vehicle they are slightly direc-

tional, in the direction of the body of the vehicle. For all practical pur-

poses, however, the radiation pattern is nondirectional. The slight direc-

tional characteristic will be observed only at extreme distances. A stan-

dard antenna connector (type SO-239) is provided on the transceiver for

easy connection to a standard PL 259 cable termination. Cobra loaded-

type antenna models ATW-500, AT-55, ATW-1000 and ATW-400 are

highly recommended for most installations. Consult your Cobra dealer

for further details.

When installed in a boat, the transceiver will not operate at maximum

efficiency without a ground plate, unless the vessel has a steel hull.

Before installing the transceiver in a boat, consult your dealer for infor-

mation regarding an adequate grounding system and prevention of

electrolysis between fittings in the hull and water.

3-Way Combinations Antennas are available which allow operation

of all three bands (AM-FM & CB), using a single antenna. However,

use of this type of antenna usually results in less than normal trans-

mit and receive range when compared to a standard-type “Single

Band” antenna designed for CB only.

19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 10

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