This circuit was found in a British documentation from 1969. It can be implemented with modern transistors. The pass band is 6 MHz.
Found in a 90s Popular Electronics this circuit has its gain given by R2. This component can be...
Using NEC 70001 AB integrated circuits, this 20 W per channel stereo amplifier was republished in the...
In the figure we have a receiver for frequency modulated light signals (see the transmitter in...