Cobra Electronics 150GTLDX User Manual

Owner’s Manual

AMATEUR 10 METER MOBILE RADIO

15 0 G T L DX

Printed in Philippines

Part No. 480-216-P

Version A

English

Introduction

Our Thanks to You and FCC License Required

Our Thanks to You

Thank you for purchasing a Cobra amateur mobile radio. Properly used, this Cobra product will give you many years of reliable service.

FCC License Required

The United States Federal Communications Commission (FCC) requires that users of the frequencies on which this radio operates be licensed. See page 16 for licensing and other FCC information.

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English

6500 West Cortland Street

Chicago, Illinois 60707 USA

www.cobra.com

Introduction Introduction

Controls and Indicators

Microphone and Features

Controls and Indicators

PA / AM / FM

Analog

Meter

Public Address (PA)

Speaker Connector

External Speaker

Connector

Microphone

Connector

A / B / C / D

Off / On / Volume

(center knob)

Squelch

(outer ring)

S/RF / SWR / CAL

RF Power

Hi / Low

Band

Microphone Gain

(center knob)

(outer ring)

+10 kHz

/ Off

RF Gain

(center knob)

Talk Back

(outer ring)

Indicator

NB/ANL

/ ANL /

Echo

(center knob)

SWR CAL

(outer ring)

RX / TX

Off

Antenna Warning

Indicator

Dim

Dual 7

Segment

Frequency

Display

Frequency

Selector

Antenna Connector

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Microphone

Press-To-Talk

Button (PTT)

WARNING

RISK OF ELECTRIC SHOCK. DO NOT OPEN. DO NOT REMOVE COVER OR BACK. NO USER SERVICEABLE PARTS INSIDE. REFER TO SERVICING TO QUALIFIED SERVICE PERSONNEL.

Features

4341 Operating Frequencies

Allows operation on all available frequencies.

415 Watts Output Power

Provides maximum power on AM and FM.

4Dual Finals

Provides steady output power.

4Dual Power

Allows operation on Low and High power.

4SWR Calibration

Allows measurement and adjustment of the antenna system.

4Antenna Warning Indicator

Illuminates when the antenna system needs repair or adjustment.

4Echo Control

4Talk-Back Control

Allows user to monitor feedback of output signal.

4Large Analog Meter

Provides high visibility of status meter.

4NightWatch™ Panel

Electroluminescent illumination of front panel for night operation.

44 Pin Front Mic Connector

Allows convenient installation in-dash.

4Frequency Counter Jack

Allows connection of a 6-digit frequency counter.

4Mic Gain Control

Allows increased voice clarity by dynamically boosting microphone.

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Allows control of echo effect.

Power Cord

English

Connector

Frequency

Counter Connector

This Cobra radio has a superior receiver that includes an RF gain control and noise blanker circuitry as well as an automatic noise limiter. The receiver also features increased protection against cross modulation and strong adjacent signals.

To obtain maximum performance, please read carefully the descriptions and operating instructions in this manual.

English

Introduction

Contents

Product Features

Introduction

Our Thanks to You . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A1

FCC License Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A1

Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A2

Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3

Your Mobile Radio

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Included in this Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Installation and Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Operating to Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Operating to Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Government Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Alternate Microphones and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

ARRL Q Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Warranty

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Trademark Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Customer Assistance

Product Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Order Form and Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Nothing comes close to a Cobra

Your Mobile Radio Your Mobile Radio

Specifications

General

Frequency Range 28.0 to 29.7 MHz

Frequency Control Phase Lock Loop (PLL) synthesizer

Frequency Stability 0.005%

Operating Temperature Range

Antenna Impedance 50 ohms

Antenna Connector Standard SO 239 type

Microphone Plug-in dynamic with Press-To-Talk switch and coiled cord

Input Voltage 13.8 V DC nominal, 15.9 V max., 10.0 V min.

Current Drain Transmit: 3.0 A

Size 2

Weight 4.8 lbs.

Meter (3-in-1) Illuminated – indicates relative output power,

Built-in Speaker 4 watts

Transmitter

Power Output Low – 4 watts; High – 15 watts

Frequency Response 300 to 3,000 Hz

Frequency Tolerance 500 Hz

Transmit Distortion 2%

Spurious Harmonic Emission

Output Indicators Meter shows relative RF output power and SWR.

Antenna Warning LED Glows red when SWR is greater than 3.0.

-22°F to 122°F (-6°C to + 50°C)

(positive or negative ground)

Receive (squelched): 0.5 A Receive (maximum audio output): 1.2 A

⁄8" (H) x 77⁄8" (W) x 93⁄4" (D)

[6 cm (H) x 20 cm (W) x 24.8 cm (D)]

received signal strength, and SWR

-65 dB

Transmit LED glows red when transmitter is in operation.

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Specifications

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Receiver

Sensitivity AM: 0.5 µV for 10 dB S/N

FM: 0.25 µV for 12 dB S/N

Audio Frequency Response

Maximum Signal to Noise Ratio

300 to 3,000 Hz

45 dB

Image Rejection 75 dB

Adjacent Channel Rejection

65 dB

RF Gain Control (AGC) 40 dB – adjustable for optimum signal reception

Squelch Adjustable – threshold less than 0.5 µV

Automatic Noise Limiter (ANL)

Switchable

Noise Blanker (NB) Switchable

Receive Indicators Meter shows relative signal strength.

Receive LED glows green when receiving a signal.

PA System

Power Output 4 watts into PA speaker

Speaker for PA (Not Supplied)

8 ohms

External Speaker

Power Output 4 watts into external speaker

External Speaker (Not Supplied)

8 ohms

(Specifications subject to change without notice)

English

Nothing comes close to a Cobra

Your Mobile Radio Your Mobile Radio

English

Controls and Indicators

Introduction

Controls and Indicators

•

Frequency

Selector

Dim

(center knob)

SWR CAL (outer ring)

Analog Meter

Antenna Warning Indicator

Band

A / B / C / D

PA / AM / FM

RF Power

Hi / Low

S/RF / SWR / CAL

RX /TX

Indicator

+10 kHz

/ Off

NB/ANL

/ ANL /

Off

Dual 7

Segment

Frequency

Display

Antenna Connector

External Speaker

Connector

Public Address (PA) Speaker Connector

Microphone Connector

Microphone Gain

(center knob)

RF Gain

(outer ring)

Power Cord

Connector

Frequency

Counter Connector

Off / On / Volume

(center knob)

Squelch

(outer ring)

Echo

(center knob)

Talk Back

(outer ring)

Included in this Package

Installation and Connection

Included in this Package

You should find all of the following items in the package with your radio.

Transceiver Universal Mounting Bracket

Operating Instructions

Microphone Bracket

Microphone

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Installation and Connection

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Refer to the illustration on page A3 for connection points on the back of the unit while installing your radio.

4Location

Plan the location of the transceiver and microphone brackets before starting the installation. Select a location that is convenient for operation and does not interfere with the driver or passengers in the vehicle. In automobiles, the transceiver is usually mounted below the dash panel, with the microphone bracket beside it.

4Mounting

Your mobile radio is supplied with a universal mounting bracket. When mounting the bracket and radio to your car, make sure it is mechanically strong. Also provide a good electrical connection to the chassis of the vehicle. Proceed as follows to mount the transceiver:

4Mount the Transceiver

1. After you have determined the most convenient location in your vehicle, hold the mobile radio with the mounting bracket in the exact location desired. If nothing will interfere with mounting it in the desired position, remove the thumbscrews and use the mounting bracket as a template to mark the holes for the mounting screws. Before drilling the holes, make sure nothing behind the surface will be damaged or interfere with the installation.

2. Connect the antenna cable plug to the standard receptacle (ANT) on the rear panel. Most antennas are terminated with a type PL-259 plug and mate with the receptacle.

3. Connect the red DC power input wire (with the fuse) to +13.8 V DC. This wire extends from the rear panel. Connect directly to positive terminal (red) of vehicle's battery.

4. Connect the black lead to -13.8 V DC. This is usually the chassis of the car. Any convenient location with good electrical contact (remove paint) may be used.

5. Mount the microphone bracket on either side of the transceiver, using the two screws supplied. When mounting in an automobile, place the bracket under the dash so the microphone is readily accessible.

6. Attach the microphone cable to the connector on the face of the transceiver.

English

NOTE

If power cables need to be shorter, we recommend attaching a 10 amp fuse to positive cable (red) at least six inches from vehicle’s battery.

Nothing comes close to a Cobra

+ 11 hidden pages