Midland Radio 79-290 User Manual

TABLE OF CONTENTS

Specifications

Installation

Location Mounting the Radio Ignition Noise Interference Antenna Tuning the Antenna for Optimum SWR External Speaker

Operation

Control and Indicators Front Panel Real Panel Operating Procedure to Receive Operating Procedure to Transmit Receiving SSB signals

SPECIFICATIONS (CB)

GENERAL

Channels 40 CH/AM//USB/LSB (120 ch. total)

Frequency Range 26.965 + 27.405 CB

Frequency Control Phase Lock Loop (PLL) synthesizer

Frequency Tolerance 0.005%

Frequency Stability 0.001%

Operating Temperature

Range -20° C to + 50° C

Microphone Plug-in dynamic; with push-to-talk switch and co

Input Voltage 13.8 V DC nominal, 15.9 max.,

11.2 V min ( negative ground)

TRANSMITTER

Power Output AM 4 Watts SSB 12 Watts PEP

Modulation AM/SSB

Intermodulation SSB 3 Distortion 5

SSB Carrier Suppression 55 dB

Unwanted Sideband 50 dB

Frequency Response AM 350 to 2500 Hz

order, more than -25 dB

order, more than -35 dB

RECEIVER

Sensitivity .50 uv AM .25 uv SSB

IF Frequency AM/FM: 10.695 MHz 1st IF, 455 kHZ 2nd IF SSB: 10.695 MHz

Adjacent-Channel Rejection 60 dB AM/SSB

Automatic Gain Control Less than 10 dB change in audio

(AGC) output for inputs from 10 to 100.000 microvolts

Squelch Adjustable; threshold <.50 uv tight 1000 uv Audio Output Power 4 watts into 8 ohms

WEATHER RECEIVER

Channels 1 162.550 2 162.400 3 162.475 4 162.425 5 162.450 6 162.500 7 162.525 8 161.550 9 161.775 10 163.275

*All specifications subject to change without notice

Your new Midland model 79-290 represents cutting edge technology in the communications field. From its high tech detachable control panel to finned cast almuinum transmitter heatsink it incorporates features found on no other CB. These features include full surface mount technoloy, fiberglass printed circuit board, dual power output stage, and a digital information screen using a black matrix LCD (liquid crystal display). All the features are under microprocessor control for increased function and reliability. Your Midland 79-290 assures you of having the ultimate technology in a CB radio.

INSTALLATION LOCATION

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

MOUNTING THE RADIO

The transceiver 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:

1. After you have determined the most convenient location in your vehicle, hold the transceiver with mounting bracket in the exact location desired. If nothing will interfere with mounting it in the desired position, remove the mounting bolts. Before drilling the holes, make sure nothing will interfere or be damaged by the installation of the mounting bolts.

2. Connect the antenna cable plug to the standard receptacle on the rear panel. Most CB 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 Vdc. This wire extends from the rear panel. In automobile installation, +13.8 Vdc is usually obtained from the accessory contact on the ignition switch. This prevents the set being left on accidentally when the driver leaves the car, and also permits operating the unit without the engine running. Locate the accessory contact on most ignition switches by tracing the power wire from the AM/FM radio in the car. The AM/FM radio power circuit generally has noise filtering built-in, making it a good place to connect your CB.

4. Connect the black lead to +13.8 Vdc. 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 the right side of the transceiver or near the transceiver, using two screws supplied. When mounting in an automobile, place the bracket under the dash so the microphone is readily accessible.

IGNITION NOISE INTERFERENCE

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