Midland 77-092 Transceiver Owners Guide

							 
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77-092 
Owners Guide 
40 Channel mobile citizens band transceiver  
						

							 
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40 Channel mobile citizens band transceiver........................ 1 
How to install your Midland mobile CB.................................. 3 
Installation and operating accessories furnished with your Midland 
CB: ................................................................................................... 3 
Where to locate your CB transceiver. ............................................... 3 
Mechanical mounting. ...................................................................... 4 
Power wiring ( negative ground only). .............................................. 4 
Installation of microphone hanger. ................................................... 5 
Antenna: ................................................................................... 5 
How to select, position install and tune the right one for you. .......... 5 
Antenna installation. ......................................................................... 6 
Tuning your antenna. ....................................................................... 6 
Factors affecting CB range ..................................................... 6 
Noise:........................................................................................ 6 
FRONT PANEL CONTROLS .................................................... 8 
BACK PANEL ........................................................................... 9 
HOW TO OPERATE YOUR TRANSCEIVER ............................ 9 
TECHNICAL SPECIFICATIONS ............................................... 9 
GENERAL ........................................................................................ 9 
TRANSMITTER .............................................................................. 10 
SERVICE................................................................................. 10 
LIMITED WARRANTY............................................................. 11 
CUSTOMER REGISTRATION ................................................ 11 
Midland 77-092 40 Channel mobile citizens band transceiver 
 
For your protection, the space below is provided for you to record the Serial 
Number of this product, which is located on the rear of the radio. After 
recording this number, keep this record for future reference along with the 
sales receipt. The sales receipt is needed should your radio ever need 
service. 
 
FCC I.D.   IQ22 6122 11 
 
Serial Number:____________________ 
 
 
Welcome to the world 
of  Midland electronics
  
						

							 
3 Congratulations. You have just purchased a state of the art mobile CB radio. 
In the years ahead, you can expect to realize-time and again the real 
reasons and meaning of the front running position Midland holds among CB 
users everywhere. You will come to know that Midland power is more than 
just a slogan, but the heading of long list of hearable, seeable benefits. As 
your Midland CB experience unfolds and grows we hope you will remember 
that CB is only one kind of electronic excellence available under the Midland 
name. 
 
Your 40 channel CB represents the state of the art in high tech engineering. 
The unit incorporates microprocessor controlled PLL circuitry for precise 
tuning. 
How to install your Midland mobile CB 
 
  This transceiver may be installed in any 12-volt negative ground-
system car or truck.  Most current U.S. and foreign vehicles use a negative 
system, but some older models and some newer large trucks may have a 
positive ground. 
 
 Check the requirements for your vehicle before you begin 
installation. 
 
  Generally, you have a negative-ground system if the minus ( - ) 
battery terminal is connected to the motor block.  Contact your dealer in the 
event you are unable to determine your vehicle’s polarity system. 
 
Installation and operating accessories furnished with your 
Midland CB: 
 
1.  Easy removal mounting bracket system. 
2.  Microphone bracket system. 
3.  All main-unit and microphone mounting hardware needed for normal      
     installation. 
4.  Plug-in microphone with coil cord. 
5.  FCC part 95, Subpart D. 
6.  Owner’s Manual. 
 
Where to locate your CB transceiver. 
 
 
Your new Midland CB is designed to be installed under the dash or 
vertically on a console of your vehicle. 
  
						

							 
4   Safety and convenience are the primary considerations in deciding 
exactly where to locate your radio. 
 
Caution:  Be sure that the unit is located so that it does not interfere with the 
driver, supplemental restraint systems (air bags), or impair access to any 
controls.  Connecting cables must be routed and secured in such a manner 
as not to interfere with the operation of the brake, accelerator or other 
controls. Interference from either the unit or connecting cables may 
contribute to the loss of control of the vehicle. 
 
Mechanical mounting. 
 
Step 1: Heeding the caution, use the mounting bracket as a template for 
marking the location of screw holes under the dash.  Use an awl, nail or 
other sharp pointed object to mark the metal. 
 
Step 2:  Drill a 1/8” hole for each screw hole in the mounting bracket. Attach 
the bracket to the dash with the Phillips head sheet metal screws provided. 
 
, Extreme care should be exercised when drilling into the dash to avoid damage to 
under-dash electronic ignition, cruise control, instrument and / or accessory 
wiring. 
 
Step 3:  Position the main unit between the bracket arms in line with the 
retention knobs.  Set the angle for optimum operating comfort and 
accessibility. 
 
Step 4 Tighten the retention knobs 
 
Power wiring ( negative ground only). 
 
Step 1:  If you have not determined whether your vehicle has a negative or 
positive ground, do so now. Then disconnect the negative lead from the 
battery to prevent short circuits that can occur during wiring. Do not connect 
this transceiver to positive ground electrical systems. 
 
Step 2:  With negative ground, connect the red wire-the one with in-line fuse 
holder to either the ( a ) fuse block, ( b ) cigarette lighter, or ( c ) directly to 
the positive post on your battery. 
 
Usually, the fuse block is the most convenient connecting point. It is also 
possible to connect to the Accessory terminal on the fuse block or ignition 
switch, so that your CB automatically goes off when the ignition goes off. In  
						

							 
5 this connection when power is removed from the radio the radio will be on 
CH 19 when power is restored to the radio. For optimum operation of the 77-
092 the red power wire can be connected to an un-switched 12 V-DC point 
(power is not controlled by the ignition switch) This connection will require 
you to turn the radio off when not in use. Then tightly connect the black wire 
directly to the vehicle’s metal frame. A good direct metal-to-metal ground is 
essential for optimum performance. 
, Installations using the cigarette lighter socket for power require an extra ground 
wire from the radio chassis to the vehicle if the radio is not fastened to a 
grounded part of the vehicle. 
  
Installation of microphone hanger. 
 
Mounting holes are provided on the microphone hanger bracket.  The 
bracket can be attached to the vehicle dash, or other convenient location. 
 
 
Antenna: 
How to select, position install and tune the right one for you. 
 
  Basically, you may choose from two types of mobile CB antennas - 
full-length whip and loaded whip - and a variety of of mounts (depending on 
where you locate your antenna).  
Midland markets a broad line of high-performance antennas. The dealer who 
sold you your Midland CB can advise which type is best for you. 
 
 
Where you locate your antenna does make a difference. 
 
Some general rules for antenna location that can aid CB performance: 
 
1.  Put your mount as high on the vehicle as possible. 
The higher the proportion of antenna length that is above the roof, the better. 
 
2.  If possible, mount the antenna in the center of whatever surface you 
choose. 
 
3.  Keep antenna cables away from noise sources, such as the ignition 
system, gauges, etc. 
 
4.  Make sure you have a solid metal - to - metal ground. 
  
						

							 
6 5.  Exercise care to prevent cable damage. 
 
Essentially, you have five location choices: the roof, gutter, rear deck, front 
cowl or rear bumper.  Where you decide to locate your antenna will 
determine the type of antenna you install.  Again consult your Midland CB 
dealer for advice and guidance, and measure your needs against the 
attributes of the various Midland antenna models he carries. 
 
Antenna installation. 
Follow the manufacturer’s installation instructions carefully. 
 
, Warning:  Never operate your CB radio without attaching an antenna or with a 
broken antenna cable.  This will result in damage to transmitter circuitry. 
 
Tuning your antenna. 
Some antennas are factory tuned.  However, performance can usually be 
improved by slightly lengthening or shortening its length, using a Standing 
Wave Radio (SWR) meter.  For the exact procedures to be used refer to the 
antenna manufacturer’s installation manual. 
 
You can buy an SWR meter separately or have your antenna checked by 
your Midland CB Dealer’s service department.
 
 
Factors affecting CB range 
Essentially, they are the same influences that optimize or limit AM and FM 
broadcast signals. 
 
Terrain: Hills, valleys and buildings naturally interrupt and shorten CB 
signals. In short, any thing that is between you and the person you want to 
talk to can shorten your CB range. You can expect to maintain maximum 
transmitting/receiving performance in flat, open country. 
 
Weather: You can expect that CB range will be reduced – perhaps 
drastically – in times of atmospheric disturbance, such as in a thunder storm 
or heavy snow. Sunspots too are known to adversely affect CB performance. 
 
Noise: 
A very common source of excessive noise is the ignition system. In many 
vehicles today the electric fuel pump is another possible source of noise. If 
you suspect this is true, turn off the ignition. With the CB in receive mode the 
noise is no longer present this is a source of the noise. In some cases the 
noise can be reduced or eliminated by making sure the CB radio chassis is  
						

							 
7 grounded. This is in addition to the power cord. In extreme cases additional 
grounding of components might be necessary. 
 
 
  
						

							 
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FRONT PANEL CONTROLS 
 
 ON/OFF VOLUME: In the off position your transceiver power is off. Turn  
    this control clockwise to switch on the unit and adjust the volume. 
 
 SQUELCH CONTROL: Adjust this control until background noise just   
    disappears. If the control is adjusted too far clockwise it may cause   
    muting of weaker signals. 
 
 MICROPHONE CONNECTOR: Plug in the supplied microphone to this  
    connector.  
 
 UP / DOWN: This easy to operate control allows changing of CB channel, 
either up or down.  
 
 CHANNEL INDICATOR: The LED displays the channel number. 
 
 TX LED: indicator for showing the unit is transmitting. 
 
 RX LED:  indicator for showing the radio is in receive mode. 
 
 Push-To-Talk bar: Press this bar to cause the radio to transmit. Hold the 
microphone about 2ninches from your mouth and speak in a normal voice. 
  
						

							 
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BACK PANEL 
ANTENNA CONNECTOR: Connect a standard 50-ohm CB antenna to this  
             connector. 
 
EXT SP: When a speaker is connected to this jack the internal speaker  
is by-passed. All received signals will be heard through the 
external speaker. The speaker connected to the “EXT” jack 
should be rated at 8 ohms and 5 watts. 
 
DC 13.8V Power cord. With in line 2 amp fuse. 
 
HOW TO OPERATE YOUR TRANSCEIVER 
You should become familiar with the controls and complete the preceding 
installation instructions before attempting operation of your CB. 
1.  Rotate the on/off volume control clockwise to turn the unit on 
2.  Adjust the squelch control fully counter-clockwise so noise is heard. 
3.  Adjust the volume for a normal listening level. 
4.  Rotate the squelch control until the noise just disappears 
5.  Select the desired channel by press in the channel UP or DOWN 
buttons. 
6.  To transmit press the PTT bar on the side of the microphone. Hold the 
microphone 2 to 3 inches from your lips and speak in a normal voice. 
7.  To receive simply release the PTT bar. 
 
TECHNICAL SPECIFICATIONS 
 
GENERAL  
Frequency range ..........................................................................26.965-27.405 MHz 
Channels ..............................................................................................................40 
Modulation type ...................................................................................................AM 
Antenna impedance .......................................................................................50 Ohm 
Loudspeaker ...................................................................................................8 Ohm 
Microphone ..................................................................................................Dynamic 
Power Supply ....................................................................13.8 VDC negative ground 
 
RECEIVER ( CB, 26.965-27.405 MHz ) 
 
Sensitivity at 10db S/N......................................................................................0.7 uV 
Selectivity ...........................................................................................45 dB +
 10 kHz 
Squelch range ......................................................................................0.5 uV-500 uV 
Audio output power ..................................................3.0 W @ 8 Ohm ( 10% distortion) 
Distortion at 1000 mV ............................................................................................3% 
Audio frequency response ........................................................................400-2400 Hz 
Intermediate frequency .......................................................I ° 10.635 MHz  II ° 455 kHz 
Spurious response ................................................................ .............more than 45 dB  
						

							 
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TRANSMITTER 
 
RF Output Power ................................................................................................4.0 W 
Frequency Tolerance .........................................................................................0.005% 
Harmonic Suppression ..........................................................................More than 60 dB 
Modulation ...........................................................................................AM 90% ( ± 5%) 
 
 
 
 
 
SERVICE 
 
If it ever becomes necessary to return your unit for service: 
 Pack the unit in its original box and packing, Improper packing may result in damage during 
shipment. Be sure to remove the microphone from the radio before packing. 
 
Include a full description of any problems. Include a DAY TIME telephone number in the event 
we need more information. 
 
You do not need to return accessory items (brackets, screws, power cord, antenna, etc.) unless 
they may be directly related to the problem. 
 
Include a photocopy of the bill of sale or other proof of purchase showing the date of sale. (credit 
card statements are not acceptable)This information must be included before warranty service 
can be considered. 
 
A flat rate charge of 45 dollars will apply to radios not covered by the Warranty. Master Card, 
Visa or Money Order accepts payment only. Personal checks will not be accepted and will delay 
the repair of your radio until we receive payment by approved methods. 
 
 
 
 
 
 
 
 
 
Midland Consumer Radio inc. 
Hereby certifies that this unit has 
been designed, manufactured,  
FCC type accepted and certified 
in accordance with part 95 and  
Part 15, Subpart C of the current  
FCC rules and regulations as of 
the date of manufacture.