CB Radio Receiver

Geographic & Historical Alert – this project was originally developed in 1979 when 27MHz AM Citizen radio band communications were common. Check that there are people broadcasting on 27MHz in your area before starting this project. This project is still included for its educational value.
Listen in to the exciting world of CB radio: emergency calls, people driving around the cities and others just making friends over the air…
This receiver covers the ‘short wave’ section of the radio frequencies between 11 and 35MHz. It will also pick up amateur radio operators talking overseas, and world-wide short wave broadcasts, especially during daylights hours.

You will need these components
Resistors:
One 1.2k ohm (brown – red – red)
One 47k ohm (yellow – violet – orange)
Capacitors:
One 10pF disc ceramic
One .001uF disc ceramic
One .01uF disc ceramic
One 60 to 160pF variable type
Diodes:
One protection diode (1N4002 or similar)
One germanium signal diode (OA91 or similar)
Transistors:
One NPN type DS548
Miscellaneous:
One battery clip
One 70cm length insulated hook-up wire (for winding coil)
One plastic ball-point pen
Two 6cm lengths insulated hook-up wire
Five lengths tinned copper wire
20 self-tapping screws with washers
Baseboard & project overlay No. 18