A linear amplifier is a specialised electronic component that increases the reception range of a citizens band (CB) radio without erecting a large outdoor antenna. The amp connects directly to the existing T/R (transmit/receive) and antenna jacks on your CB radio using cables, which are typically supplied with the amp or can be purchased at an electronics store. You'll also need to rig a ground wire from the amp to a grounded metal post.
Turn off power to the radio and unplug the linear amp before connecting the two components.
Disconnect the current antenna wire from the back of the CB radio and attach one end of a coaxial cable to the antenna jack. Fasten the other end of the cable to the antenna jack on the linear amp. tighten the connectors on the cable ends clockwise by hand to lock the cable in place.
Hook up the remaining coaxial cable from the T/R jack on the back of the radio to the T/R jack on the amplifier.
Cut a length of 18-gauge electrical wire long enough to connect from the amp's ground terminal to a metal post or other grounded metal. Strip an inch of insulation off each end of the wire.
Attach one end of the wire to the "GRD" connector on the linear amp and secure the other end to the metal post or other grounded metal.
Adjust the wattage control on the front of the CB radio to match the rated wattage of your linear amp, which is listed in the owner's manual and possibly on the back panel of the amplifier as well. Failure to follow this step may result in a blown amplifier.
Plug in the power cord for the linear amp and turn on your equipment.
Always check the wattage output of your radio to ensure it is within the capacity of the linear amp before turning on the equipment.