This is one of the channels of an amplifier suggested by Westinghouse in 1970s documentation. The circuit uses components from the era and no information about the transformer is given.
This circuit came out in a Popular Electronics from December 1995. It is a double T configuration that...
Found in a 1967 Electronic Design, this circuit can detect pulses as narrow as 0.2 us. Active...
This is the basic configuration of a Colpitts LC oscillator using a CMOS gate. ...