This oscillator uses a small IF transformer taken from an old transistor radio. FET admits equivalents. The circuit can be used to calibrate radios.
This basic CMOS 4001 circuit was found in the April 1976 issue of Radio Electronics magazine. The...
This circuit was obtained in a 1980 English magazine, but it can be easily assembled today, since...
This circuit is from the time when photos were revealed in darkrooms. We found it in a 1968...