This receiver, whose tuning range depends on L1 and L2, was found in the 1992 special edition of Radio Electronics Experimenter. The circuit is relatively simple and has good sensitivity.
Two operational amplifiers are used in this source obtained in an American documentation...
This class B push-pull amplifier circuit with a few hundred milliwatts of power was found in an...
This circuit is from the Motorola Linear Databook of 1990. The coils must be according to the...