This circuit was found in an American 1980s documentation. The transistorized step is the receiver's last IF and the diode is the receiver's existing detector.
Found in an English publication from 1967, this circuit generates 5 kHz signals with harmonics that...
This circuit was found in a 1991 publication. The transistor can be a general-purpose type....
This circuit was obtained from an English magazine from 1985. The N414 is a complete, not easy to...