Midland 77-255og Transceiver Owners Manual

 
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2 Your 40 channel CB represents the state of the art in high tech engineering. 
This unit is not only a full feature CB transceiver but incorporates a high 
performance 10 channel NOAA weather bureau VHF receiver. The full 10-
channel weather receiver allows use on all current and future NOAA weather 
bureau channels plus Canadian and international channels. The unit 
incorporates microprocessor controlled PLL circuitry for precise tuning and 
increased function. Receiver noise and interference can now...

 
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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. 
 
  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 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,...

 
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(Usually, the fuse block is the most convenient connecting point. It is also 
possible to connect to the Accessory terminal on the fuse block, so that your 
CB automatically goes off when the ignition goes off, preventing accidental 
battery drainage.) 
 
The orange wire supplies power for the memory retention feature.  For the 
memory retention circuit to operate the orange wire must be connected to 
power that is not switched off by the ignition switch.  The connection point 
can be directly to...

 
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and tune the right one for you. 
 
  Basically, you have two types of mobile CB antennas - full-length 
whip and loaded whip - and a variety of types of mounts (depending on 
where you locate your antenna) to choose from. 
 
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: 
 
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6 Warning:  Never operate your CB radio without attaching an antenna or with 
a broken antenna cable.  This can 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...

 
7 FRONT PANEL CONTROLS 
 
1. ROTARY CHANNEL SELECTOR: This easy to operate control allows 
    changing of weather or CB channel, either up or down. This control will 
    not operate when the channel “LOCK” function has been activated.  
 
2. MICROPHONE CONNECTOR: Plug in the supplied microphone to this  
    connector. The collar ring has a screw on locking ring. Push the ring onto  
    the units collar and screw on until it is tight.  
 
3. ON/OFF VOLUME: In the off position your transceiver’s...

 
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15. CB/WX: This button causes your unit to change modes between NOAA  
    weather bureau receiver and CB operation. 
16. M1, M2, M3 BUTTONS: These buttons select CB channels 
previously 
     set by the operator for quick recall. To store channels to memory: 
     a. Select the desired channel using the rotary channel selector knob. 
     b. Press and hold the memory button to be set for two seconds.  Two  
         beeps will sound when the channel is memorized. 
     c. To recall a channel for...

 
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HOW TO OPERATE YOUR TRANSCEIVER FOR CB USE 
You should become familiar with the controls and complete the preceding 
installation instructions before attempting operation of your CB. 
1. Adjust the squelch control fully counter-clockwise 
2. Rotate the on/off volume control clockwise to turn the unit on. Adjust the 
volume for a normal listening level. 
3. Select the desired channel by the rotary channel selector. Rotate the 
squelch control until the background noise is just quieted. You are now...

 
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TECHNICAL SPECIFICATIONS 
 
 
GENERAL  
 
Frequency range ..........................................................................26.965-27.405 MHz 
Channels ..............................................................................................................40 
Modulation type ...................................................................................................AM 
Antenna impedance .......................................................................................50...