To build a linear amplifier for a CB radio, you need a linear amplifier kit. Make the necessary holes onto the chassis, and solder the electrical components onto the circuit board.
Source for parts or use a linear amplifier kit. Check that all parts are new, and clean using a lint-free cloth. Use the amplifier kit's schematic as a reference guide, before proceeding. Using dimensions front the power supply, jack, and frequency meter, create a rectangular opening on the front of the turret board panel. Make two holes on each side of the chassis, for the jacks and another one on the back, for the supply socket using a 4-millimeter drill.
Using a soldering iron insert the resistors, capacitors, transistors, relay coils and potentiometers into the turrets on the board and flatten the connector pins on the other side of the board, and then solder the pins into the metal trace strip.
Attach the circuit board to the chassis and solder a one-inch piece of power wire to output terminals of the meter and jack. Solder another power wire on the power supply's output terminal and a ground wire to its other output terminal.
Screw the jacks onto each side of the chassis, secure with washers. Mount the frequency meter to the front panel and the power supply to the back. Solder each component's red wire to the circuit board and connect the potentiometer to the frequency meter.
Solder the power supply wire onto the positive terminal and the black to the negative. Solder the input jack to the board eyelet before the first resistor and the output jack wire on the other side of the resistor. Cover the chassis with the amplifier casing, and screw it in place.