This circuit covers the bands from 1.8 to 150 MHz, with plug-in coils whose characteristics are given next to the diagram. The FET can be a BF245. We found it in old documentation.
Found in documentation from the 1980s, this circuit makes use of discrete components of the time....
This circuit was found in an Elektor from the 90s. The circuit is critical, requiring a very...
This project makes use of a technology without many digital components and that can be easily...