This circuit was found in an Electronic Experimenter Handbook from the 90's. The coil can be formed by 4 turns of wire 28 with 0.5 cm diameter without core for the FM band.
This ground-based circuit was found in 1990s American documentation. The transistor can be any...
We found this circuit in a Radio Electronics issue from November 1976. The circuit is for vehicles of...
With this circuit it is possible to obtain a voltage modulated in amplitude with a maximum current of...