Radio Circuits

These circuits operate in the RF (Radio Frequency) spectrum. These kits are a great way to learn a lot about radio broadcasting, and for a low cost too. If you're looking for more 'Professional' transmitters, please use our search engine to find one.
This is a complete AM radio for the standard broadcast band, most of which is on a single IC. Other components, such as coils and variable capacitor to make a finished radio are in...
Training course of 56 pages is divided into 9 lessons; Audio Amplifier, AM Detector, AM IF, AM Amplifier, Amplifier, AM Mixer & Oscillator, FM Detector, 1st FM IF, 2nd FM IF, FM RF...
FM Radio Receiver Box Kit with Auto-Scan Function.
This is a circuit that will broadcast CD quality sound to you FM Walkman, home stereo or automobile radio. It produces a strong signal that will generally cover the average home an...
The most powerful circuit we've seen that operates on such low voltage (just two AA cells). A range of 100 meters can be expected and, given a good antenna and FM receiver, 500 met...
A powerful little circuit with surprisingly good audio quality. Can transmit up to 1/2 mile in open spaces. This is one of the most powerful FM transmitters that you can legally pu...
The most powerful circuit we've seen that operates on such low voltage (just two AA cells). A range of 100 meters can be expected and, given a good antenna and FM receiver, 500 met...
Sound turns on the transmitter, which operates in the FM radio band. A neat way to catch a thief in another room or garage. The volume of sound needed to trigger the circuit is adj...