Found in an Electronic Design from the 80s, this circuit uses an unusual component today, the regulator integrated circuit. MOSFET can be almost any type.
Found in a 1960 Sylvania manual, this circuit can be implemented with a modern equivalent...
This configuration, already presented in other points of this section and website, is of a...
We found this precise crystal oscillator for the 144 MHz band, depending on the crystal used. The...